UFC Vegas 121: Rosas Jr. vs. Barcelos continues on the main card with a fight between Norma Dumont and Ailin Perez in the bantamweight division. Check out our UFC Vegas 121 odds series for our Dumont-Perez prediction and pick.
Norma Dumont (13-3, 9-3 UFC) had her five-fight win streak snapped in April 2026, dropping a three-round unanimous decision to Joselyne Edwards. That came right after she edged Ketlen Vieira by split decision in November 2025, a fight that kept her rolling before hitting a wall against a tougher, ranked opponent. Now “The Immortal” looks to bounce back as he comes into his fight this weekend against Ailin Perez.
Ailin Perez (13-2, 6-1 UFC) rides a six-fight winning streak into this bout, most recently dominating Macy Chiasson with six takedowns and over seven and a half minutes of control time for a clean unanimous decision sweep in February 2026. That followed a similarly grinding decision win over Karol Rosa at UFC 311, showcasing her ground-control style. Perez now looks to extend her run as he comes into his fight this weekend against Norma Dumont.
UFC Vegas 121 Odds, courtesy of DraftKings.
UFC Vegas 121 Odds: Norma Dumont-Ailin Perez Odds
Norma Dumont: +120
Ailin Perez: -142
Over 2.5 rounds: -540
Under 2.5 rounds: +360
Watch sports LIVE with fuboTV (free trial)Why Norma Dumont Will Win
Norma Dumont brings a significant experience advantage into this bout, having gone 9-3 across a long UFC run that includes wins over durable veterans like Aspen Ladd and Ketlen Vieira. That kind of championship-level pedigree at 135 gives her a tactical edge over an opponent whose UFC success has come largely against less battle-tested competition.
Perez's six-fight win streak, while impressive, is built heavily on control time and grinding decisions rather than dominant finishing, and Dumont has shown she can weather that kind of pressure and grapple back given her own submission wins. If Dumont can neutralize Perez's clinch and takedown game early, the fight opens up for her sharper standup.
Dumont is also the naturally bigger, longer fighter at bantamweight, a physical trait that has historically given her trouble-free advantages in the striking department against smaller opponents. Her one recent loss to Joselyne Edwards came against a live, awkward striker, not because of any physical shortcoming against Perez's more straightforward pressure style.
Given her size, durability, and higher-level experience, look for Dumont to weather Perez's early control attempts and take over in the championship rounds to reclaim her spot near the top of the division.
Article Continues BelowWhy Ailin Perez Will Win
Ailin Perez enters this fight with clear momentum, riding a six-fight winning streak that includes dominant, control-heavy performances over legitimate competition like Macy Chiasson and Karol Rosa. That kind of sustained success shows her wrestling and clinch pressure translate consistently at the highest level, something Dumont hasn't faced as reliably in recent outings.
Dumont, by contrast, just snapped a five-fight win streak with a decision loss to Joselyne Edwards, suggesting the division may be catching up to her after a long veteran run. A fighter coming off a setback often shows hesitation early, which plays directly into Perez's strength of imposing an immediate physical pace.
Perez's takedown volume, highlighted by six takedowns and heavy control time against Chiasson, gives her a proven blueprint to neutralize bigger, rangier strikers like Dumont. If she can replicate that clinch-and-control approach here, Dumont's striking advantages become far less relevant over 15 minutes.
Perez is also younger and coming off her best form yet, while Dumont, now further along in her career, may not have the same gas tank to fight off constant grappling pressure. Expect Perez's wrestling-heavy style to control the pace and secure another decision win, extending her streak to seven.
Final Norma Dumont-Ailin Perez Prediction & Pick
This fight pits Norma Dumont's size and veteran striking against Ailin Perez's relentless grappling pressure and six-fight winning streak. Dumont just snapped her own five-fight run with a decision loss to Joselyne Edwards, so how she responds mentally to adversity will be a key storyline early.
Expect Perez to push forward from the opening bell, looking to replicate the clinch-and-control blueprint that worked so well against Macy Chiasson, using takedowns to neutralize Dumont's reach advantage. If Dumont can keep this standing and use her length, she has the tools to pick Perez apart at range.
The deciding factor will likely be whether Dumont's takedown defense holds up over three rounds against Perez's volume. Given Perez's current form and physical pressure, she should find enough success to control the pace late.
Perez gets the win by decision, extending her win streak to seven behind sustained clinch work and control time.
Final Norma Dumont-Ailin Perez Prediction & Pick: Ailin Perez via decision