Norma Dumont vs Ailín Pérez: analysis & prediction

PRELIM · WOMEN'S BANTAMWEIGHT · 3 ROUNDSUFC Fight Night: Rosas Jr. vs. Barcelos
Norma Dumont — Women's Bantamweight fighter

Norma Dumont

“The Immortal”
13W3L
Technical Counter-Striker
VS
Ailín Pérez — Women's Bantamweight fighter

Ailín Pérez

“Fiona”
13W2L
Volume Wrestler

4.90 takedowns per fifteen minutes, in a cage five feet too small

Women's BantamweightMeta APEX, Las Vegas, Nevada, United StatesSeptember 26, 202625ft Octagon (Small Cage) — 31% less canvas than the standard 30ft

Fight overview

The fight in 30 seconds

Pérez needs to turn repeated wrestling entries into attacking positions against Dumont, rather than collect brief takedowns. Their contrasting results against Chiasson make that route worth examining, but a common opponent does not predict this fight; Dumont's hand-fighting and ability to separate remain central.

Paths that change the fight

  • Norma DumontSixty-seven inches of range in the middle of a cage she has to be willing to walk forward across. If Pérez is shooting from distance rather than locking hands on the fence, Dumont out-lands her by two rounds and wins a technical decision.
  • Ailín PérezA body lock on the fence inside the first ninety seconds. Three or four landed takedowns and six-plus minutes of control across fifteen minutes wins two rounds on modern scoring, even while losing the strike count.
What limits this estimate · Analyst conviction: 5/10
  • Strength of schedule is not close — a former champion, a title challenger, a perennial top-five and a 25-minute main-event win are a tier above anything on the other résumé.
  • 64% strike defence (#3 in the division) and 2.33 absorbed per minute, against a fighter who lands only 2.88 significant strikes per minute at distance.

Editorial assessment of the evidence, not a win probability or a calibrated confidence interval.

Norma Dumont

Freshness unverified
Model win probability
46%
Fair decimal odds
2.17
Reference quote+120 (BetOnline)

Ailín Pérez

Freshness unverified
Model win probability
54%
Fair decimal odds
1.85
Reference quote-140 (BetOnline)
Price freshness & calculation notes

Quotes older than 48 hours are marked outdated. EV at an old or undated price is a historical calculation, not a current opportunity. Date-only snapshots have no verified capture time.

Sources and data limitations

Four conflicts were resolved rather than reprinted. UFC.com's takedown block is broken for both fighters — it prints "5 landed / 16%" for Dumont and "1 landed / 2%" for Pérez — so both ledgers were rebuilt from the round-by-round log: Dumont 17 of 30 (57%), Pérez 23 of 49 (47%). Pérez's streak_pattern is duplicated (28 entries, 24-4, exactly double her real ledger) so her career_sig_dealt is doubled too and only her ratios are usable. And the aggregate deltas from her Chiasson night imply an implausible ~8 significant strikes absorbed over fifteen minutes, so that single figure was discarded. Ages are recomputed from date of birth against September 26, 2026 — Dumont 35, Pérez 31. Neither fighter's round-by-round sample includes their 2026 bout. No rating-system figures are cited for either fighter.

Model methodology
Read the evidenceInspect prices and assumptions
01

The Frame

What this fight is really about — and the measurements that shape it

The Analyst's Take

The fight reduces to one question with an unusually clean piece of evidence behind it. Norma Dumont's single structural hole is a bantamweight who commits to takedown volume — Macy Chiasson put her down 6 times in 12 attempts with 7:34 of control and beat her — and in February 2026 Ailín Pérez put that same Macy Chiasson down roughly six times over fifteen minutes. Pérez leads this 15-woman division in takedown volume at 4.90 per 15 minutes, more than three times the divisional average of 1.56, and holds 132 seconds of control per round against Dumont's 71. Against that, Dumont brings two inches of height, a 64% strike-defence wall that ranks third in the division, eleven decision wins, and a career-long refusal to lose twice in a row. We take Pérez 54% / Dumont 46% — a real but modest lean, and almost entirely a judges'-scorecard fight.

Norma Dumont
Attribute
Ailín Pérez
35
Age
31
5'7"
Height
5'5"
67"+1" Dumont
Reach
66"
38.5"+2.5" Dumont
Leg Reach
36.0"
Orthodox
Stance
Not published — no stance listed on UFC.com or in either fight records
Not published — null in both databases
Team
Goat Shed Academy, Buenos Aires
Feb 29, 2020
Octagon Debut
Sep 3, 2022
Long-range technical striker, counter-puncher
Fighting Style
Kung Fu base — functionally a clinch-wrestling grinder

Dumont owns the frame, Pérez owns the engine room. Two inches of height, one inch of reach and 2.5 inches of leg reach all belong to Dumont, and she spent most of her UFC career at 145 lbs against genuinely bigger women — Megan Anderson at 6'0", Felicia Spencer, Macy Chiasson at 5'11", Aspen Ladd. But length has never been the thing that stops Ailín Pérez: she has been the shorter fighter in effectively every UFC win of her career — Pudilová at 5'7", Edwards at 5'9", Rosa at 5'7", Chiasson at 5'11" — and she still leads the division in takedown volume at 4.90 per fifteen minutes. Her entries are body-lock and clinch-based rather than shot-based (46 of 98 career clinch takedowns, 47%), which is exactly the entry that does not care about a two-inch height gap. Dumont's counter-evidence is real too: 72% official takedown defence, and across the eleven UFC bouts in the round-by-round log opponents have landed only 9 of 26 attempts — but six of those nine came in one night, against Chiasson, and she lost that fight.

Venue Factor
This is the Meta APEX, whose octagon is 25 feet rather than the standard 30 — roughly 31% less canvas area. Dumont's technique profile carries a pressure rate of 0.00 and a counter rate of 0.38: she is a fighter who wins by giving ground, resetting and punishing entries at range, and she spends 81.4% of her striking output at distance. Take away five feet of retreat room and you take away the mechanism. Note where her April loss happened — the Apex, against a forward-pressure opponent, on a night the cage-cutting favoured the aggressor. Pérez, whose whole game is walking someone onto the fence and hitting a body lock, gets the venue she would have picked.
02

The Fighters

Careers, chins, schedules — and the form they bring into the cage

Norma Dumont landing a straight right on Aspen Ladd

Norma Dumont

Pro Record
13-3-0
UFC Record
9-3 across twelve bouts since February 2020
Streak
Coming off a loss — her first since 2022 (Joselyne Edwards, UD, April 2026)
Finish Rate
15% (2 of 13 wins) — zero finishes in twelve UFC fights
Avg Fight Time
14:53
Chin · Good — 2 knockdowns absorbed in twelve UFC bouts, 50% recovery, never finished at 135SOS · Higher tier — graded StrongTechnical Striker · Counter Striker

The ceiling fighter who just got shown a floor. Dumont was, until April, four fights from a title shot and six fights unbeaten: Wolf, Rosa, Chandler, de Randamie, Aldana, Vieira — a run that included a former featherweight champion and a woman who has spent five years in the top five. Then Joselyne Edwards, ranked #11 walking in, took a unanimous decision (29-28, 29-28, 30-27) at UFC Vegas 116 on April 25, 2026, and the manner mattered more than the result. Dumont landed roughly 51 significant strikes across the full fifteen minutes and absorbed roughly 69, well under half her career pace of 3.85 per minute. Reporting from the night is consistent: she banked the second round with counters, then, apparently believing she was up 2-0, fought the third off the back foot and let Edwards own the optics. She also landed zero takedowns, the first time her secondary path produced nothing at all. Her rebuttal is a genuine one — she has never lost two in a row. After the Anderson knockout in 2020 she went 3-0; after the Chiasson loss in 2022 she went 6-0.

Ailín Pérez controlling an opponent on the mat against the fence

Ailín Pérez

Pro Record
13-2-0
UFC Record
6-1 across seven bouts since September 2022
Streak
Six-fight UFC win streak — unbeaten since her 2022 debut
Finish Rate
46% (6 of 13 wins) — one finish in seven UFC fights
Avg Fight Time
12:41
Chin · Iron — zero knockdowns absorbed across her logged UFC roundsSOS · Solid and rising — graded StrongWell-Rounded · Balanced MMA

The exact opposite trajectory: a 2022 debut submission loss to Stephanie Egger, then six straight UFC wins with nothing on the other side of the ledger since, culminating in a 29-28 × 3 unanimous decision over Macy Chiasson at UFC Fight Night 268 in Mexico City on February 28, 2026 — a fight she lost the first round of on all three cards and then swept. She has never been knocked down in the Octagon and has never lost a decision in her professional career. Her striking rate is misleading in both directions: 2.88 significant strikes per minute looks anaemic against a 4.03 divisional average, but 35% of her significant strikes land on the ground at 81.6% accuracy and 17% land in the clinch at 78.8%. Her raw activity is high — pace tier Elite Activity, engagement score 50.2 against Dumont's 35.6 — she simply spends her minutes wrestling instead of throwing. The four KO/TKO wins on her record are all regional, between 2019 and 2022; UFC-only, the denominator is seven fights and the count is zero.

Norma Dumont
0 dealt · 0 absorbed
Knockdown Exchange
KD dealt vs absorbed. A dash means that figure was not published.
Ailín Pérez
0 dealt · 0 absorbed

Norma Dumontsignature weapons

Rear-Naked ChokeBoth pre-UFC — Jungle Fight 90 (Sep 2016) and Federação Fight 5 (Sep 2017). Zero submission attempts in 32 logged UFC rounds; treat her submission threat in 2026 as effectively nil.
×2
The Fifteen-Minute DecisionEleven of thirteen career wins, nine of them consecutive Octagon decisions — jab rate 0.56, counter rate 0.38, leg kick 0.47, and the highest strike defence in this fight at 64%.
×11

Ailín Pérezsignature weapons

Arm-Triangle from Half GuardDarya Zheleznyakova, R1 3:52, September 2024 — her only UFC finish. Sub timing label Early Hunter: 100% of her attempts come in Round 1, and her mount technique rate is 0.50.
×1
Ground-and-Pound TKOCardozo (R1 1:02), Aguirre (R1 3:51) and Bragayrac (R2) — all regional, 2019–2022. In the Octagon the same position produces control instead: 81.6% ground striking accuracy, zero KO/TKOs in seven appearances.
×3
Head KickAlessandra Tainara, R1 4:20 — Samurai Fight House bantamweight title, August 2021. Head-kick technique rate 0.39.
×1

Norma Dumont

L
Joselyne Edwards
Decision — Unanimous (29-28, 29-28, 30-27)

Opponent context: veteran

RR3
UFC Vegas 116 — Apr 25, 2026 (co-main)
W
Ketlen Vieira
Decision — Split

Opponent context: elite

RR3
UFC FN: Garcia vs. Onama — Nov 1, 2025
W
Irene Aldana
Decision — Unanimous (30-27 × 3)

Opponent context: elite

RR3
UFC 306: Riyadh Season Noche UFC — Sep 14, 2024
W
Germaine de Randamie
Decision — Unanimous

Opponent context: elite

RR3
UFC FN: Allen vs. Curtis 2 — Apr 6, 2024
W
Chelsea Chandler
Decision — Unanimous (30-27 × 3)

Opponent context: prospect

RR3
UFC FN: Holm vs. Bueno Silva — Jul 15, 2023
Pattern

Five fights, five full fifteen-minute decisions, zero rounds of finishing threat in either direction. The quality is undeniable — Aldana and Vieira are top-five names and the Aldana night was a masterclass: 159 significant strikes landed of 309 thrown to Aldana's 69, three 30-27 cards. But two of the five were razor-thin. Vieira went split despite Dumont out-landing her 62-25, because Vieira banked two takedowns and 5:19 of control. And the Edwards night is the tell — a ~51-strike, zero-takedown, back-foot performance in which she let a #11-ranked pressure fighter buy the third round with forward movement. When a bantamweight puts control minutes on Norma Dumont's card, her margins collapse to a coin flip regardless of the strike count.

Ailín Pérez

W
Macy Chiasson
Decision — Unanimous (29-28 × 3)

Opponent context: veteran

RR3
UFC Fight Night 268, Mexico City — Feb 28, 2026
W
Karol Rosa
Decision — Unanimous (29-28, 29-28, 30-27)

Opponent context: veteran

RR3
UFC 311: Makhachev vs. Moicano — Jan 18, 2025
W
Darya Zheleznyakova
Submission — Arm-Triangle (half guard)

Opponent context: prospect

RR1 (3:52)
UFC FN: Moicano vs. Saint Denis — Sep 28, 2024
W
Joselyne Edwards
Decision — Unanimous (30-27, 29-28, 29-28)

Opponent context: veteran

RR3
UFC 302: Makhachev vs. Poirier — Jun 1, 2024
W
Lucie Pudilová
Decision — Unanimous (29-27, 29-28, 29-28)

Opponent context: prospect

RR3
UFC FN: Allen vs. Craig — Nov 18, 2023
Pattern

Five wins, zero losses, and a takedown ledger that reads like a thesis statement. Edwards: 6 takedowns of 11 attempts plus a Round-2 knockdown. Pudilová: 2 of 8 with 8:36 of control across three rounds, including a mount she could not be swept from. Evans-Smith, the fight before this window: 10 takedowns of 15 with 11:36 of control in a fifteen-minute fight. Against Rosa she pivoted — only 2 takedowns of 8, so she out-struck her instead, closing with 33 of 67 in the third. Against Chiasson she lost Round 1 on all three cards, adjusted, and took the last two. The recurring feature is adaptability without panic: she is the only fighter in this matchup who has demonstrably changed a losing plan mid-fight and won anyway.

Norma Dumont

Win Methods
Wins by Round

Ailín Pérez

Win Methods
Wins by Round
Critical Insight
The structural fork is who owns the scorecard, not who owns the finish. Combined, these two are 0 KO/TKO finishes in 19 UFC appearances and exactly one stoppage of any kind — Pérez's arm-triangle on Darya Zheleznyakova. Dumont has 11 decision wins and 0 finishes in twelve Octagon bouts; Pérez has 7 decision wins, 0 decision losses, and all six of her career finishes came in Round 1 or Round 2. Two notes on the charts. The donuts are career-scoped, straight from the win-method tables, and both reconcile exactly: Dumont 0 + 2 + 11 = 13 wins, Pérez 4 + 2 + 7 = 13. The round bars show only finishes whose round is on record, which is why Dumont's read 11 decisions and nothing else — her two career submissions are rear-naked chokes from Jungle Fight 90 (September 2016) and Federação Fight 5 (September 2017), and neither promotion published the finishing round. Nothing has been estimated to fill them in.

Common Opponents

OpponentNormaAilín
Macy ChiassonL· SD3 (UFC 274, May 2022) — taken down 6 of 12 with 7:34 of controlW· UD3 29-28 × 3 (Feb 2026) — approximately six takedowns over fifteen minutes
The backbone of the pick. In Dumont's other ten logged UFC bouts, opponents managed 3 takedowns of 14 attempts combined. Chiasson is the one fighter who broke her grappling defence — and Pérez beat that same fighter doing the same thing four months ago.
Karol RosaW· UD3 (Apr 22, 2023) — a full fifteen-minute distance decisionW· UD3 29-28, 29-28, 30-27 (UFC 311, Jan 2025)
The one night Pérez's wrestling did not work — 2 takedowns of 8 — and she won anyway by out-striking Rosa, closing with 33 of 67 significant strikes in the third round. It is her proof of a Plan B, and it is also the version of this fight Dumont wants.
Ashlee Evans-SmithW· UD3 (Nov 28, 2020) — out-pointed over fifteen minutesW· Decision — 10 takedowns of 15 attempts with 11:36 of control
Same opponent, same result, two completely different mechanisms. Dumont won the strike count; Pérez won eleven and a half of the fifteen minutes on top. That is the fight in miniature.
Joselyne EdwardsL· UD3 29-28, 29-28, 30-27 (UFC Vegas 116, Apr 25, 2026)W· UD3 30-27, 29-28, 29-28 (UFC 302, Jun 2024) — 6 takedowns of 11 plus an R2 knockdown
The woman who just beat Dumont on forward pressure is a woman Pérez took down six times and knocked down. The common-opponent web does not settle the fight, but every strand of it runs the same direction.
03

The Numbers

Composites, division ranks and round-by-round evidence

Composite scores summarize selected statistics on a 0–100 scale. They are not win probabilities. Compare the underlying metrics, opponent quality and sample flags before interpreting a score difference as a matchup advantage.

Striking

SLpM 25% · StrAcc 30% · StrDef 30% · SApM 15%

0
Norma
0
Ailín

At pure distance Dumont wins on every axis that matters: 3.85 landed per minute to 2.88, 64% strike defence (#3 of 15) to 57% (#10), and 2.33 absorbed against a 3.03 divisional average. Pérez's striking edge is efficiency, not production — 56% accuracy (#3) and 1.58 SApM (#3) are elite, but they are the numbers of someone who throws few strikes from dominant positions. Strip the takedowns out and this is a Dumont kickboxing match by two rounds.

Grappling

TD/15 25% · TDAcc 25% · TDDef 30% · Sub/15 20%

0
Norma
0
Ailín

The widest gap in the fight and it is not close. Pérez attempts takedowns at 3.4× Dumont's rate — 4.90 per fifteen minutes, #1 of 15, 3.1× the divisional average — and holds 1.9× the control time per round. Dumont's rebuttal is 57% accuracy on her own entries (17 of 30) and a 72% defence, but her offensive submission threat is literally zero: no attempts in 32 logged rounds. If this hits the mat, only one person can gain from it.

Technical

(Striking + Grappling) / 2

0.0
Norma
0.0
Ailín

Dumont holds the striking edge by three points; Pérez holds the grappling edge by eleven. Net technique goes to Pérez — driven entirely by the takedown and control differentials, not by anything she does with her hands at range.

Cardio

Fight time · pace · R3/R1 output · champ rounds

0
Norma
0
Ailín

Closer than the four-year age gap suggests. Dumont's average fight lasts 14:53, her momentum label is Strong Finisher (R3 output 132% of R1) and her slow-start rate is 27.3%. Pérez's pace tier is Elite Activity with an engagement score of 50.2 to Dumont's 35.6, and 132 seconds of control per round is enormous sustained grappling labour — but her ground share falls 52.6% to 11.5% across three rounds and her R3 output is only 96% of R1. Dumont's late striking engine is the better one; Pérez's late wrestling engine is the one that fades.

Overall

(Technical + Cardio) / 2

0.0
Norma
0.0
Ailín

Half a point, and that is an honest representation of the matchup. Dumont is the better striker and the better distance athlete; Pérez is the better grappler and the better scorecard architect; the composite spread between them is smaller than the noise in either fighter's sample. The lean that follows comes from matchup specifics — the Chiasson blueprint, the cage size, and Dumont's demonstrated passivity when she believes she is ahead — not from a skill chasm.

MetricNormaAilín
Avg Fight Time14:5312:41
Pace TierHigh — engagement score 35.6Elite Activity — engagement score 50.2
R3/R1 Output132% — Strong Finisher (21.8 vs 16.4 sig)96% — Steady, with ground share down 41.1 points
Slow Start %27.3% — but R1 is still her lowest output round at 16.4Front-loaded — 1.83 takedowns and 2:28 of control in R1 alone
Champ RoundsOne 25-minute fight (Ladd, 2021) — flagged Fades Significantly, n=1Never fought five rounds — deepest tested water is fifteen minutes

Archetype Base Rate

Technical Striker · Counter Striker 48.9%51.1% Well-Rounded · Balanced MMA

180-fight archetype sample (92-88 to Well-Rounded) · The archetype history grades this near-dead-even: Well-Rounded is 92-88, or 51.1%, against Technical Striker across 180 recorded matchups. That is roughly where the composites landed too — a 0.5-point overall spread — which is why the model's lean comes from matchup specifics rather than from the base rate.

Norma DumontAilín Pérez

Women's Bantamweight

· 15 fighters
StatNormaNorma rankDiv avgAilín rankAilín
SLpM3.85
9/15
~4.03
11/15
2.88
Str Acc51%
7/15
~48.4%
3/15
56%
Str Def64%
3/15elite
~58.5%
10/15
57%
SApM2.33
5/15
~3.03
3/15
1.58
KD Avg0.17 (2 dealt / 2 absorbed)—~0.12—0.17 (1 dealt / 0 absorbed)
Damage Ratio1.99 (574 dealt / 288 absorbed)
2/15elite
~1.52
4/15
2.04 (ratio only — counts are duplicated)
TD/151.43
6/15
~1.56
1/15elite
4.90
TD Def72% official (raw log 65% — 9 of 26 absorbed)———73% official (raw log 67% — 3 of 9 absorbed)
Sub/150.00 — no attempts in 32 logged rounds—~0.34—0.17 — one attempt, one finish
Avg Fight Time14:53———12:41
Statistical Verdict
Every marker of range, size, defence and volume belongs to Norma Dumont, and every marker of position, control, activity and recency belongs to Ailín Pérez. Dumont is #3 in strike defence, #5 in absorption and #2 in damage ratio; Pérez is #1 in takedown volume at 3.1× the divisional average, #3 in accuracy and #3 in absorption, with 132 seconds of control per round against 71. Two figures are not division-ranked because they are not comparable that way: both takedown-accuracy lines were rebuilt from the round-by-round log after UFC.com's landed/accuracy pair proved corrupt for each fighter, and Pérez's damage ratio is usable only as a ratio because the underlying counts are duplicated in the source table. The honest formulation is that Dumont wins the fight that is a kickboxing match, Pérez wins the fight that has wrestling in it — and Pérez is the only one of the two who gets to decide which fight it is.

Significant Strikes Landed per Round

Control Time per Round (sec)

Norma Dumont

  • Her output climbs every round — 16.4 significant strikes landed in the first, 21.7 in the second, 21.8 in the third — and her accuracy climbs with it, from 45.0% to 55.2%. The momentum label is Strong Finisher, R3 output at 132% of R1.
  • Control time follows the same curve: 59, 69 then 100 seconds, and her own takedown rate doubles to 0.80 landed in the third. The wrestling exists when she chooses it — 6 of 8 on de Randamie with 10:04 of control, 3 of 3 on Chandler with 8:58.
  • Zero submission attempts in any of the 32 logged rounds. This is not a rounding artifact; her two career submissions are pre-UFC rear-naked chokes from 2016 and 2017.
  • What she gives up barely moves: 9.7, 10.8 then 11.4 significant strikes absorbed per round, and 0.18 rising to 0.40 takedowns conceded. Ground strikes are 0.0 per round of her absorbed output — which is precisely why the Chiasson night stands out so violently.

Ailín Pérez

  • The most front-loaded grappling round in the division: 1.83 takedowns and 148 seconds — 2:28 — of control in Round 1 alone. She scores her position before her opponent has finished measuring the range, which is how a 5'5" fighter beats 5'7" to 5'11" opponents on cards.
  • Round 2 barely drops off — 1.20 takedowns and 135 seconds of control — while she concedes only 5.6 significant strikes. That is how two rounds get banked before a strike count matters.
  • Round 3 is where it decays: control falls to 89 seconds, takedown accuracy falls from roughly 55% to 33%, and her ground share of striking collapses from 52.6% to 11.5%, a 41.1-point drop.
  • Her absorbed strikes triple in the third, 6.7 to 16.0 — the clearest single sign of the late fade, and it arrives in exactly the round where Dumont is at her best.
Critical Insight
Two numbers in these tables decide the fight. Pérez averages 1.83 takedowns and 2:28 of control in Round 1 alone, and Dumont's Round 1 is her lowest output round at 16.4 landed. Then it inverts: Pérez's third-round absorbed strikes triple to 16.0 while her control drops to 89 seconds, and Dumont's Round 3 is her best round — 21.8 landed at 55.2% accuracy off 100 seconds of control, momentum label Strong Finisher. The scorecard almost certainly reads: Pérez takes Round 1, Dumont takes Round 3, and Round 2 — where Pérez still holds 1.20 takedowns and 2:15 of control against Dumont's 21.7 landed strikes — decides a 29-28.

Strike targeting (available rounds)

Strike-target figures are unavailable for this comparison.

Head hunting vs body work vs leg attack — the shape of the damage. Unavailable strike-target figures are omitted rather than shown as 0%.

Striking range — distance, clinch and ground

NormaAilín
81%Distance48%
13%Clinch17%
6%Ground35%

Approximate share of significant strikes by range in available rounds, weighted by strike volume. Incomplete splits are excluded. Debutants / fighters without Octagon samples show as N/A.

04

The Story of the Fight

Advantages, worst cases, gameplans — and the patterns underneath

Where the fight lives

Who owns each phase — and by how much
Open SpaceNorma owns it

81.4% distance share, 64% strike defence (#3 of 15), +2" height and +1" reach against 2.88 SLpM

Pocket / ExchangesNorma owns it

Jab 0.56 and counter 0.38 against 0.22 / 0.22 — but Pérez's 56% accuracy is the highest in the fight

ClinchAilín owns it

46 of 98 career clinch takedowns (47%) at 78.8% clinch accuracy, against Dumont's 13.1% clinch share

GroundAilín owns it

132 sec control per round vs 71, 34.8% ground share vs 5.5%, 81.6% ground accuracy — and zero Dumont submission attempts in 32 rounds

Path to Victory

Norma Dumont

Sixty-seven inches of range in the middle of a cage she has to be willing to walk forward across. If Pérez is shooting from distance rather than locking hands on the fence, Dumont out-lands her by two rounds and wins a technical decision.

Why they win
01
Range and frame

+2" height, +1" reach and +2.5" leg reach, and the only fighter here who has campaigned successfully at featherweight against 5'11" to 6'0" opponents — Anderson, Spencer, Chiasson, Ladd.

02
The best defensive striking in the fight

64% strike defence, third of fifteen in the division, against Pérez's 57% (tenth), and 2.33 absorbed per minute against a 3.03 divisional average. Her damage ratio of 1.99 is second in the division.

03
The distance jab-and-counter system

Jab rate 0.56, counter rate 0.38, leg kick 0.47 — the exact toolkit for keeping a 5'5" wrestler on the outside for fifteen minutes, and the highest jab figure in this matchup by more than double.

04
She finishes rounds, not fights

R3 output at 132% of R1, R3 accuracy 55.2%, R3 control 100 seconds. She is the better third-round fighter and this is a three-round bout — and it is exactly the round where her opponent's takedown accuracy falls to 33%.

05
Level of competition and the rebound record

de Randamie, Aldana, Vieira, Ladd and Spencer are a tier above anything on the other résumé. And she has never lost two in a row: 3-0 after the Anderson knockout, 6-0 after the Chiasson loss. She is 2-for-2 at answering a defeat.

The gameplan
  1. 1
    Own the centre — for the first time in her career

    Her pressure rate is 0.00 and the cage is 25 feet. Circling to the fence in this building is how the Edwards fight was lost; she has to walk Pérez backward and make her shoot from distance.

  2. 2
    Jab the level change

    Pérez enters on the body lock, not the shot. A hard jab and a 38.5-inch teep to the hips are the two tools that stop her from getting hands locked in the first place.

  3. 3
    Underhook, wall-walk, get up fast

    Every second she spends on her back is a scorecard second. Her one catastrophic night — Chiasson, 7:34 controlled — was a night she stayed down.

  4. 4
    Fight for the last thirty seconds of every round

    She is the better third-round fighter and the better finisher of rounds. Visible late damage is how you overturn control-time optics with judges.

  5. 5
    Take her own takedowns when the clinch presents

    She is 17 of 30 with real top control — 6 of 8 and 10:04 against de Randamie, 3 of 3 and 8:58 against Chandler. Two rounds where she has the control time removes Pérez's entire path.

Path to Victory

Ailín Pérez

A body lock on the fence inside the first ninety seconds. Three or four landed takedowns and six-plus minutes of control across fifteen minutes wins two rounds on modern scoring, even while losing the strike count.

Why they win
01
Takedown volume with no peer in the division

4.90 per fifteen minutes, #1 of 15, 3.1× the divisional average of 1.56 — roughly 29 landed across seven UFC fights, entered on the body lock rather than the shot, where a two-inch height gap does not protect.

02
Control-time dominance

132 seconds per round against Dumont's 71 — the highest single differential on this card. 11:36 of control on Evans-Smith, 8:36 on Pudilová, 3:08 in a single round on Edwards.

03
The Chiasson blueprint, executed twice

The only opponent ever to break Dumont's grappling defence — 6 takedowns of 12 with 7:34 of control at UFC 274 — is a fighter Pérez herself took down roughly six times and beat in February 2026.

04
Efficiency and durability

56% striking accuracy (#3 in the division), 1.58 absorbed per minute (#3), chin tier Iron with zero knockdowns absorbed, and a damage ratio of 2.04. She has never lost a decision in her professional career.

05
The cage, the calendar and the adaptability

A 25-foot Apex octagon removes the retreat lanes a counter-striker with a 0.00 pressure rate depends on — in the same building where Dumont was walked down in April. Add four years of youth, six straight wins, and a demonstrated ability to lose Round 1 and win the fight anyway.

The gameplan
  1. 1
    Close inside 90 seconds of Round 1

    Her R1 average is 1.83 takedowns and 2:28 of control — get the first score on the board before Dumont has found her range, in the round that is Dumont's lowest-output of the three.

  2. 2
    Fence, body lock, trip

    Not shots from distance against a 67-inch frame. Clinch entries, where she is 46 of 98 (47%) across her career and where height does not protect.

  3. 3
    Bank control, then strike from position

    81.6% ground accuracy and 78.8% clinch accuracy. Every minute on top is both points and damage, and Dumont absorbs essentially nothing on the ground because she is essentially never there.

  4. 4
    Do not chase the finish

    She has no UFC knockout and one submission attempt in seven fights. Two clear rounds is the entire assignment — burning the tank hunting a stoppage is how the third-round fade arrives early.

  5. 5
    Spend the third round on the fence, not in the centre

    Even a failed takedown attempt against the cage reads better to judges than a retreating counter-exchange with a longer striker. If the entries have stalled by mid-Round-2, convert to the Karol Rosa plan — volume at distance, 33 of 67 in a third round — rather than emptying the tank on stuffed shots.

Danger Zone

How Norma Dumont loses

  • The UFC 274 replay. Pérez body-locks her to the fence in the first ninety seconds, lands three or four takedowns across fifteen minutes, banks six to eight minutes of control, and wins 29-28 on cards that never care that Dumont out-landed her at distance.

  • The UFC Vegas 116 replay. She wins the middle round clearly, decides she is up 2-0, spends the third circling on the back foot, and loses a round on optics to a fighter walking forward — for the second consecutive fight.

  • Ground-and-pound accumulation. Pérez lands 81.6% of her ground strikes; three rounds of elbows and short shots from half guard and mount is the one route to Dumont's first UFC stoppage loss at 135, and she has no offensive submission threat to deter it — zero attempts in 32 rounds.

Danger Zone

How Ailín Pérez loses

  • The Rosa fight without the escape hatch. She goes 2-of-8 on takedowns, gets held at 67 inches, and has to win a kickboxing match against the division's third-best strike defender at 2.88 significant strikes per minute. She loses that 30-27.

  • The third-round fade arrives at the worst time. Her ground share drops 41 points into the third and her absorbed strikes triple to 16.0; if the fight is 1-1 going in, Dumont's best round meets Pérez's worst.

  • Dumont grapples her. Pérez has been controlled for 56 to 81 seconds per round by ordinary opponents; Dumont's 57% takedown accuracy and 10:04 control night against Germaine de Randamie is a live counter-script that would gut Pérez's entire scoring model.

One documented failure mode, and the exact opponent shaped to fit it

The Chiasson Corridor

Norma Dumont has been in twelve UFC fights and lost her grappling exchanges decisively in exactly one of them. At UFC 274 in May 2022, Macy Chiasson landed 6 takedowns of 12 attempts and accumulated 7:34 of control while Dumont out-landed her only 38-32; the cards came back split, against Dumont. In the ten other logged bouts, opponents managed 3 takedowns of 14 attempts combined. That is not a fighter with a bad bottom game — it is a fighter with one demonstrated failure mode that requires a specific opponent to trigger: a bantamweight who commits to takedown volume rather than opportunism. Ailín Pérez is, by the division's own numbers, the most committed takedown-volume fighter at 135 pounds. And in February 2026 she put approximately six takedowns on that same Macy Chiasson across fifteen minutes. The corridor is open, it is narrow, and Pérez is the exact shape to fit through it.

6 of 12
Chiasson's takedowns on Dumont — the only night her defence broke
Why the strike count keeps failing to buy the margin

Cruise Control and the Optics Tax

The most instructive thing about the Edwards loss is not that Dumont lost — it is how. She landed roughly 51 significant strikes across fifteen minutes against a career pace that would predict 58, landed zero takedowns, appeared to win the second, and then spent the third on the back foot with a lead she believed she had. She has now been on the wrong side of this dynamic three times: Chiasson took her cards with control time despite a near-even strike count; Vieira nearly did the same in November 2025 despite being out-landed 62-25, on the strength of two takedowns and 5:19 of control; Edwards did it with pure forward pressure. Dumont's out-striking has repeatedly failed to buy the margin the raw numbers suggest, because the thing she does not do — advance, control, impose — is the thing judges reward. Pérez does nothing but that.

62-25
Dumont's strike edge on Vieira — and still only a split decision
The venue stops being neutral

Twenty-Five Feet

The Meta APEX octagon is 25 feet across rather than the standard 30 — about a third less floor. For most matchups this is a footnote. For this one it is a variable, because one fighter's technique profile reads pressure 0.00, counter 0.38, distance-strike share 81.4%, and the other's reads body lock 0.17, mount 0.50, ground-strike share 34.8%. A counter-striker who never advances needs room to make an aggressor miss and reset; there is 31% less of it here. Add that Dumont's April loss happened in this same building, to a forward-pressure opponent, on optics — and that Pérez fights out of a small-gym clinch system built for exactly this geometry.

31%
less canvas area than a standard 30-foot octagon
The rate-vs-career scope trap on both sides

Two Broken Takedown Displays

Both fighters carry a UFC.com takedown block that contradicts itself, and both have been rebuilt here rather than reprinted. Dumont is shown as 5 landed at 16% accuracy while her published 1.43 per fifteen minutes across 178.5 UFC minutes mathematically requires 17 landed — and her round-by-round log sums to precisely 17 of 30, 57%. Pérez is shown as 1 landed at 2% accuracy while her 4.90 per fifteen across 88.8 minutes requires roughly 29 — and her log sums to 23 of 49, 47%, through UFC 311, with the balance falling on the Chiasson night. Separately, note the scope trap in Pérez's finishing line: four career KO/TKO wins, all of them regional between 2019 and 2022, and zero KO/TKOs in seven UFC appearances. Her power does not project into this fight; her position does.

The one place the argument genuinely favours Dumont

Strength of Schedule, Qualitatively

She has beaten a former UFC champion in Germaine de Randamie, a title challenger in Irene Aldana — 30-27 on all three cards while landing 159 significant strikes — a long-tenured top-five contender in Ketlen Vieira, and Aspen Ladd over 25 minutes in a five-round main event. Pérez's best three wins, Chiasson, Rosa and Edwards, are good wins against durable, ranked-adjacent opposition, but they are not that. Both fighters are graded Strong on schedule strength, yet the eye test and the résumé both say Dumont has operated a tier higher for longer. This is the primary reason the split here is 54-46 and not 60-40, and the primary reason the conviction rating is a 5.

The Five-Round Clock

Norma Dumont danger windowAilín Pérez danger windowNeutral / contested
R1 · 0:00–5:00Pérez's round by a distance

1.83 takedowns and 148 seconds of control per opening round — she scores position before opponents have solved her range, and Dumont's R1 is her lowest output round of the three at 16.4 landed. If Dumont has not banked a clear first, she is almost certainly down 1-0.

Critical Insight
Pérez's win equity is front-loaded — she banks Round 1 with position and needs only to split the remaining two. Dumont's win equity is back-loaded — her output, accuracy and control all peak in Round 3, and her opponent's takedown game demonstrably decays into that same round. The fight is a race between Pérez's early control minutes and Dumont's late volume, and in a 25-foot cage the early control minutes are easier to obtain.

Finish Threat by Round

Share of each fighter's wins that end in each round — early finishers spike left, grinders rise right.

05

The Verdict

One hundred simulated fights, the betting market, and our conviction

If you only read 3 things
1

Norma Dumont has exactly one documented way to lose a grappling exchange — Macy Chiasson, 6 takedowns of 12 with 7:34 of control at UFC 274 — and in February 2026 Ailín Pérez put roughly six takedowns on that same Macy Chiasson and beat her.

2

Pérez leads the division in takedown volume at 4.90 per fifteen minutes, 3.1× the divisional average, with 132 seconds of control per round to Dumont's 71. Dumont answers with 64% strike defence (#3 of 15), two inches of height and the better third round — 21.8 landed at 55.2%, and 132% of her first-round output.

3

Model: Pérez 54% / Dumont 46%, conviction 5/10. Eighty-five of a hundred simulations reach the scorecards, because these two are a combined one finish in nineteen Octagon appearances.

Model outcomes per 100 fights

Each square represents one percentage point of the model distribution, not an observed fight. This visualization does not measure model accuracy or reduce uncertainty in the inputs.

Dumont Decision — 43%Dumont Submission — 1%Dumont KO/TKO — 2%Pérez KO/TKO — 7%Pérez Decision — 42%Pérez Submission — 5%

Each square = 1 simulated fight. Norma Dumont gold · Ailín Pérez orange · full color = decision, 70% = submission, 45% = KO/TKO.

The takedown differential

Pérez at 4.90 per fifteen minutes, #1 in the division, against Dumont's 72% official and 65% raw takedown defence. Pérez does not need a high success rate — she needs three or four landed takedowns across fifteen minutes to own two rounds on optics, and she attempts roughly five.

Control-time optics

132 seconds per round against 71, pointed at a fighter whose last three close fights all turned on control time: Chiasson took her cards with it, Vieira nearly did despite being out-landed 62-25, and Edwards did it with pure forward pressure.

Range control and the frame

Dumont's +2" height, +1" reach, +2.5" leg reach and 64% strike defence against clinch-based entries. In every branch where Pérez has to shoot from distance rather than lock hands on the fence, the Dumont decision bucket — the largest single outcome at 43 — is where the sim lands.

Round-3 decay against a Strong Finisher

Pérez's ground share falls 41.1 points and her absorbed strikes go 6.7 to 16.0 into the third, arriving in the exact round where Dumont's output is 132% of her first and her accuracy peaks at 55.2%. It is the single strongest argument for the plus-money side.

The common-opponent web and the rebound record

Chiasson runs in both directions, Rosa and Evans-Smith were beaten by both, and the woman who just beat Dumont was taken down six times and knocked down by Pérez. Against it: Dumont is 2-for-2 at answering a loss, 3-0 after Anderson and 6-0 after Chiasson, and has never lost consecutive fights.

Fight Scripts

0%
of simulations

The Fence and the Body Lock

Pérez closes inside ninety seconds of the first, lands the trip, and rides two minutes of top control with ground strikes at 81.6% accuracy. The second round looks enough like the first that two of three judges stop caring about the strike count. 29-28, and the same unglamorous way she has won the last six.

Scripted outcomes for Norma Dumont vs Ailín Pérez — how each version of this fight unfolds.

Norma Dumont win probability
0%
43%
KO/TKODECSUB

  • Deliberately near-zero. Zero finishes in twelve UFC bouts, zero knockdown-power signal beyond the baseline — 2 knockdowns dealt in twelve fights against a division average of 0.12. A stoppage win here would be a career first, and it would have to come from accumulated distance volume rather than a single shot.

  • The single largest bucket on the page, and correctly so: eleven decision wins, the better strike defence at 64%, the better third round, and a genuine claim to every minute the fight spends at range. If Pérez's takedowns miss, this is a 30-27.

  • One point. Sub/15 of 0.00 is literal — no submission attempts in 32 logged rounds — and her two career submissions are regional rear-naked chokes from 2016 and 2017, before she ever entered the UFC.

Ailín Pérez win probability
0%
7%
42%
5%
KO/TKODECSUB

  • Ground-and-pound accumulation at 81.6% ground accuracy, not a punch at distance. Her four career KO/TKO wins are all regional between 2019 and 2022; she has zero in seven Octagon appearances, which caps this hard.

  • Nearly identical to Dumont's decision bucket, arrived at completely differently: three or four takedowns and six-plus minutes of control across fifteen minutes wins two rounds on modern scoring even while losing the strike count — exactly as Chiasson did in 2022 and Vieira nearly did in 2025.

  • Five points. One UFC attempt, one finish — the arm-triangle on Zheleznyakova at 3:52 of the first — with a mount technique rate of 0.50 and a sub timing label of Early Hunter, 100% of attempts in Round 1. Live but thin.

Projected Scorecards

How the model scores each round
R1
Ailín
R2
Ailín
R3
Norma
29-28 Pérez
Round 1 on control, Round 2 on the repeat entry, Round 3 to Dumont's volume
The modal card, and the exact shape of the Chiasson decision in 2022
29-28 Dumont
Pérez banks the first, Dumont takes the middle round on 21.7 strikes and closes the third
The competitive alternative — most of her 43-point decision bucket
30-27 Dumont
The entries stall at 2-of-8 and it becomes a fifteen-minute kickboxing match
Her cleanest path, and it needs the takedowns to miss from the opening bell

Model and price

Norma Dumont

Freshness unverified
Model win probability
46%
Fair decimal odds
2.17
Reference quote+120 (BetOnline)
Estimated EV
+1.2%
Edge vs no-vig market
+2.2 pp

Ailín Pérez

Freshness unverified
Model win probability
54%
Fair decimal odds
1.85
Reference quote-140 (BetOnline)
Estimated EV
-7.4%
Edge vs no-vig market
-2.2 pp

EV uses the displayed price: probability × decimal odds − 1. Edge is a percentage-point difference from a proportionally de-vigged, same-book pair. A dash means that comparison is unavailable.

Price freshness & calculation notes

Quotes older than 48 hours are marked outdated. EV at an old or undated price is a historical calculation, not a current opportunity. Date-only snapshots have no verified capture time.

Fair odds are the break-even price under this estimate, not a recommended entry price. Model uncertainty can erase a small edge.

What price would change the calculation? · Norma Dumont

Change the assumptions to see how the required price moves. This does not update the published model or recommend an entry price.

Required decimal price: 2.18 or higher. At the exact unrounded break-even price, estimated EV is zero.

What price would change the calculation? · Ailín Pérez

Change the assumptions to see how the required price moves. This does not update the published model or recommend an entry price.

Required decimal price: 1.86 or higher. At the exact unrounded break-even price, estimated EV is zero.

Full prop table (0)Expand for odds, model %, implied % and analyst verdict per prop

No prop prices recorded in this analysis.

Original analyst price notes

These notes describe the original analysis and may refer to older prices.

The posted moneyline is fairly priced against a 54-46 lean. Fight goes the distance at 85% is the structural chalk — one stoppage in nineteen combined Octagon appearances. Pérez by decision is the correct expression of the thesis; Dumont by decision at plus-money is the live contrarian ticket if Pérez's entries stall. Avoid Dumont inside the distance at 3%. The props table is empty until BetOnline posts markets beyond the moneyline.

Conviction
0
5/10

Editorial confidence in the evidence, not a win probability or a calibrated confidence interval.

A real but modest lean built on one specific, well-documented vulnerability and one venue effect — and capped by Dumont's superior strength of schedule, superior strike defence, superior third round, and a career-long refusal to lose consecutive fights. Lean: Ailín Pérez.

What backs the lean

  • Takedown volume of 4.90 per fifteen minutes — #1 in the division and 3.1× the divisional average — pointed at the one hole in Dumont's game.

  • The Chiasson corridor: the only fighter to break Dumont's grappling defence (6 of 12, 7:34 control, UFC 274) is a fighter Pérez took down roughly six times and beat in February 2026.

  • Control time of 132 seconds per round against 71 — the exact currency that has decided Dumont's last three close fights (Chiasson L, Vieira SD, Edwards L).

  • The Edwards tape is four months old: a back-foot third round, roughly 51 significant strikes in fifteen minutes, zero takedowns, and a 0.00 pressure rate on a night pressure decided the cards.

  • A 25-foot Apex cage removes the retreat room a non-pressuring counter-striker requires — in the same building where April's loss happened.

  • Six straight wins, four years younger, chin tier Iron with zero knockdowns absorbed, and a demonstrated ability to lose Round 1 and win the fight anyway.

What limits it

  • Strength of schedule is not close — a former champion, a title challenger, a perennial top-five and a 25-minute main-event win are a tier above anything on the other résumé.

  • 64% strike defence (#3 in the division) and 2.33 absorbed per minute, against a fighter who lands only 2.88 significant strikes per minute at distance.

  • Dumont is the better third-round fighter — 21.8 landed at 55.2%, Strong Finisher, 132% of R1 — exactly where Pérez's ground share collapses 41 points and her absorbed strikes triple.

  • +2" height, +1" reach and +2.5" leg reach, from a career spent beating physically larger women at featherweight.

  • She has never lost two in a row: 3-0 after the Anderson knockout, 6-0 after the Chiasson loss.

  • Her own wrestling is a real counter-script — 17 of 30 (57%), including 6 of 8 with 10:04 of control against Germaine de Randamie.

Final Assessment

In roughly 54 of 100 simulations, Ailín "Fiona" Pérez wins the fight she has been asking for since 2024 — and she wins it the same unglamorous way she has won the last six: a body lock on the fence inside the first ninety seconds, a trip, two minutes of top control, ground strikes at 81.6% accuracy, and a second round that looks enough like the first that two of three judges stop caring about the strike count. Forty-two of those are decisions, a handful come from accumulated ground-and-pound, and a thin slice from the early submission hunt that produced the Zheleznyakova arm-triangle. The mechanism is not mysterious: Norma Dumont has exactly one documented way to lose a grappling exchange, and Ailín Pérez is the division's purest expression of it — in a cage five feet too small for a counter-striker who never advances.

In the other 46, Norma "The Immortal" Dumont reminds everyone why she was one fight from a title shot in March. She takes the centre for the first time in her career, jabs the level changes into the canvas, punishes the failed entries with a 38.5-inch leg reach, and wins a fifteen-minute technical decision, with a bare 3% tail where accumulated volume produces the first stoppage of her Octagon life. That version is entirely available to her: she is the longer, more accurate, better-defended, better-schooled fighter, she owns the third round on every metric that matters, and she has answered every previous loss of her career by winning at least three straight.

The data gives Pérez the takedowns, the control minutes, the cage geometry, the recency and the common-opponent blueprint; it gives Dumont the frame, the strike defence, the third round, the résumé and the refusal to lose twice running. On September 26 at the Meta APEX in Las Vegas, we take Fiona narrowly and on the scorecards — and we do not fade The Immortal at plus-money, because the only thing standing between her and a 30-27 is five feet of canvas she has to be willing to walk forward across.

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