In 5 days
UFC Fight Night 289: Rosas Jr. vs. Barcelos
· Sat 26 Sep 2026 · UFC
Norma Dumont vs Ailín Pérez
Norma Dumont
“The Immortal”
13-3 · +115
1,678Elo
vs
Bantamweight
Ailín Pérez
“Fiona”
13-2 · -136
1,600Elo
Our model
Market says
What is at stake
What each result would do to the ratings and the boardsNorma Dumont
A win
+68to 1,746
Bantamweight#9
→#2
A loss
-107to 1,571
Bantamweight#9
→#19
Ailín Pérez
A win
+107to 1,707
Bantamweight#15
→#4
A loss
-68to 1,532
Bantamweight#15
→#24
Tale of the tape
The better of each pair is litNorma DumontAilín Pérez
1,678
Elo
1,600
1,234
KO rating
1,197
1,171
Sub rating
1,151
1,402
Dec rating
1,261
Wins by
0
KO/TKO
4
2
Submission
2
11
Decision
7
Losses by
1
KO/TKO
0
0
Submission
1
2
Decision
0
Prices
The current consensus across the booksNorma DumontAilín Pérez
+115Moneyline-136
How long it goes
Over 2.5-500
Under 2.5+387
What the model makes of it
All bets to place →- Over 2.5 rounds2.5 rounds 90% v 81% 6.4% -500 bet
- Norma Dumontmoneyline 46% v 45% 0.9% +120 pass
- Ailín Pérezmoneyline 54% v 55% -4.7% -140 pass
How the line has moved
Norma Dumont's chance by each book's moneyline, margin taken out, over 4 days
BetOnline
Pinnacle
Other books
| Book | Norma Dumont | Ailín Pérez | Changes | ||
|---|---|---|---|---|---|
| Opened | Now | Opened | Now | ||
| BetOnline | +169 | +120 | -200 | -140 | 38 |
| Pinnacle | +101 | +121 | -118 | -142 | 12 |
| Bet365 | +110 | +105 | -132 | -132 | 114 |
| BetMGM | +110 | +110 | -130 | -135 | 3 |
| BetRivers | +107 | +102 | -132 | -127 | 4 |
| BetUS | +114 | +118 | -135 | -140 | 22 |
| Bookmaker | +106 | +115 | -130 | -141 | 16 |
| Bovada | +112 | +115 | -133 | -135 | 4 |
| Caesars | +110 | +110 | -130 | -130 | 2 |
| Circa | +110 | +115 | -130 | -135 | 4 |
| DraftKings | +110 | +120 | -130 | -142 | 8 |
| Hard Rock | +105 | +100 | -130 | -125 | 4 |
| MyBookie | -110 | +115 | -126 | -147 | 18 |
Common opponents
Everyone both have fought, most recent firstNorma DumontAilín Pérez
Fight history
Every bout either man has on record, newest first. Amateur bouts are shaded. Blank means we hold no figure, not zero.
Norma Dumont
13-3 now · 16 bouts on record
Full profile →
| # | Date | Result | Opponent | Method | Round | Age | Elo | Opp Elo | Close | Weight class | Event |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 16 | 2026-04-25 | L |
 Joselyne Edwards
|
DecisionUnanimous | R315:00 | 35.6 | 1,725-46 | 1,646 | -205 | Bantamweight | UFC Fight Night 274: Sterling vs. Zalal Ultimate Fighting Championship |
| 15 | 2025-11-01 | W |
Ketlen Vieira
|
DecisionSplit | R315:00 | 35.1 | 1,754-30 | 1,686 | -168 | Bantamweight | UFC Fight Night 263: Garcia vs. Onama Ultimate Fighting Championship |
| 14 | 2024-09-14 | W |
 Irene Aldana
|
DecisionUnanimous | R315:00 | 34.0 | 1,692+68 | 1,670 | -110 | Bantamweight | UFC 306: Noche UFC: O'Malley vs. Dvalishvili Ultimate Fighting Championship |
| 13 | 2024-04-06 | W |
 Germaine de Randamie
|
DecisionUnanimous | R315:00 | 33.5 | 1,674+18 | 1,648 | -124 | Bantamweight | UFC Fight Night 240: Allen vs. Curtis 2 Ultimate Fighting Championship |
| 12 | 2023-07-15 | W |
 Chelsea Chandler
|
DecisionUnanimous | R315:00 | 32.8 | 1,593+81 | 1,566 | -140 | Featherweight | UFC on ESPN 49: Holm vs. Bueno Silva Ultimate Fighting Championship |
| 11 | 2023-04-22 | W |
Karol Rosa
|
DecisionUnanimous | R315:00 | 32.6 | 1,594-1 | 1,546 | -115 | Featherweight | UFC Fight Night 222: Pavlovich vs. Blaydes Ultimate Fighting Championship |
| 10 | 2022-09-10 | W |
Danyelle Wolf
|
DecisionUnanimous | R315:00 | 31.9 | 1,536+58 | 1,413 | -405 | Featherweight | UFC 279: Diaz vs. Ferguson Ultimate Fighting Championship |
| 9 | 2022-05-07 | L |
Macy Chiasson
|
DecisionSplit | R315:00 | 31.6 | 1,551-15 | 1,507 | -225 | Featherweight | UFC 274: Oliveira vs. Gaethje Ultimate Fighting Championship |
| 8 | 2021-10-16 | W |
Aspen Ladd
|
DecisionUnanimous | R525:00 | 31.0 | 1,458+93 | 1,636 | +114 | Featherweight | UFC Fight Night 195: Ladd vs. Dumont Ultimate Fighting Championship |
| 7 | 2021-05-22 | W |
 Felicia Spencer
|
DecisionSplit | R315:00 | 30.6 | 1,375+83 | 1,625 | +155 | Featherweight | UFC Fight Night 188: Font vs. Garbrandt Ultimate Fighting Championship |
| 6 | 2020-11-28 | W |
Ashlee Evans-Smith
|
DecisionUnanimous | R315:00 | 30.2 | 1,298+76 | 1,253 | +119 | Bantamweight | UFC on ESPN 18: Smith vs. Clark Ultimate Fighting Championship |
| 5 | 2020-02-29 | L |
 Megan Anderson
|
KO/TKORight Cross | R13:31 | 29.4 | 1,335-36 | 1,568 | +197 | Featherweight | UFC Fight Night 169: Benavidez vs. Figueiredo Ultimate Fighting Championship |
| 4 | 2018-08-05 | W |
Mariana Morais
|
DecisionMajority | R315:00 | 27.8 | 1,358-13 | 1,210 | -- | Bantamweight | Shooto Brazil 86: Pinheiro vs. Oliveira Shooto Brasil |
| 3 | 2017-09-16 | W |
Erica Leidiane
|
SubRear Naked Choke | R13:30 | 27.0 | 1,341+17 | 952 | -- | Featherweight | FMMAMG - Federacao Fight 5 Federação Fight |
| 2 | 2017-07-15 | W |
Patricia Borges
|
DecisionUnanimous | R315:00 | 26.8 | 1,318+23 | 1,162 | -- | Bantamweight | Jungle Fight 91: Contagem Jungle Fight |
| 1 | 2016-09-03 | W |
Tainara Lisboa
|
SubRear Naked Choke | R12:58 | 25.9 | 1,231+88 | 1,231 | -- | Bantamweight | Jungle Fight 90 Jungle Fight |
Ailín Pérez
13-2 now · 16 bouts on record
Full profile →
| # | Date | Result | Opponent | Method | Round | Age | Elo | Opp Elo | Close | Weight class | Event |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 16 | 2026-02-28 | W |
Macy Chiasson
|
DecisionUnanimous | R315:00 | 31.4 | 1,570+30 | 1,574 | -179 | Bantamweight | UFC Fight Night 268: Moreno vs. Kavanagh Ultimate Fighting Championship |
| 15 | 2025-01-18 | W |
Karol Rosa
|
DecisionUnanimous | R315:00 | 30.3 | 1,545+28 | 1,591 | +201 | Bantamweight | UFC 311: Makhachev vs. Moicano Ultimate Fighting Championship |
| 14 | 2024-09-28 | W |
 Darya Zheleznyakova
|
SubArm Triangle Choke | R13:52 | 30.0 | 1,475+70 | 1,406 | -206 | Bantamweight | UFC Fight Night 243: Moicano vs. St. Denis Ultimate Fighting Championship |
| 13 | 2024-06-01 | W |
Joselyne Edwards
|
DecisionUnanimous | R315:00 | 29.7 | 1,432+43 | 1,384 | -200 | Bantamweight | UFC 302: Makhachev vs. Poirier Ultimate Fighting Championship |
| 12 | 2023-11-18 | W |
 Lucie Pudilová
|
DecisionUnanimous | R315:00 | 29.1 | 1,374+57 | 1,457 | -185 | Bantamweight | UFC Fight Night 232: Allen vs. Craig Ultimate Fighting Championship |
| 11 | 2023-07-15 | W |
Ashlee Evans-Smith
|
DecisionUnanimous | R315:00 | 28.8 | 1,325+49 | 1,162 | -240 | Bantamweight | UFC on ESPN 49: Holm vs. Bueno Silva Ultimate Fighting Championship |
| 10 | 2022-09-03 | L |
 Stephanie Egger
|
SubRear Naked Choke | R29:54 | 27.9 | 1,410-85 | 1,419 | +209 | Featherweight | UFC Fight Night 209: Gane vs. Tuivasa Ultimate Fighting Championship |
| 9 | 2022-05-22 | W |
 Stephanie Bragayrac
|
KO/TKOCorner Stoppage | R210:00 | 27.6 | 1,338+72 | 1,276 | -- | Bantamweight | SFH 4: Perez vs. Bragayrac Samurai Fight House |
| 8 | 2022-02-12 | W |
Romina Aguirre
|
KO/TKOGround & Pound | R13:51 | 27.4 | 1,313+26 | 1,006 | -- | Bantamweight | SFH 3: Prado vs. Basualdo Samurai Fight House |
| 7 | 2021-11-06 | L |
Tamires Vidal
|
DQIllegal Knees | R313:00 | 27.1 | 1,313+0 | 1,299 | -- | Bantamweight | SFH 2: Perez vs. Vidal Samurai Fight House |
| 6 | 2021-08-21 | W |
Alessandra Tainara
|
KO/TKOKO/TKO | R14:20 | 26.9 | 1,258+55 | 1,121 | -- | Bantamweight | SFH 1: Perez vs. Tainara Samurai Fight House |
| 5 | 2021-06-04 | W |
Geyse Yasmin
|
DecisionUnanimous | R315:00 | 26.7 | 1,226+32 | 1,114 | -- | Featherweight | Natal Fight Championship 19 Natal Fight Championship |
| 4 | 2019-06-07 | W |
Fiorella Cardozo
|
KO/TKOKO/TKO | R11:02 | 24.7 | 1,176+62 | 1,070 | -- | Bantamweight | CFU 12: Arena Collision Fight Ultimate |
| 3 | 2018-12-07 | W |
 Laurita Ribeiro
|
SubRear Naked Choke | R26:45 | 24.2 | 1,097+80 | 1,065 | -- | Bantamweight | CFU 10: Revolution Fight Collision Fight Ultimate |
| 2 | 2018-11-24 | W |
Noemi Galarza
|
DecisionUnanimous | R315:00 | 24.1 | 1,057+39 | 974 | -- | Flyweight | ULLAMP - Liga Sudamericana Mixed Real World Fighters |
| 1 | 2018-06-09 | W |
Brenda Marchessi
|
SubArmbar | R23:00 | 23.7 | 1,015+43 | 887 | -- | Flyweight | Better Fighters 4 Better Fighters Argentina am |