June 6, 2026 · Meta APEX, Las Vegas
Chaves
6-0-0
Poções, Bahia, Brazil | 29 years old
Duben
6-1-0 (1 NC)
Littleton, Colorado, USA (from Valencia, Venezuela) | 28 years old
The Unbeaten Brazilian vs The Venezuelan Bomber
Jeisla Chaves arrives 6-0, a battle-tested survivor of a bloody DWCS war against Sofia Montenegro — she got taken down and punished in round three, came back, and took the cards. Yuneisy Duben also earned her contract on the Contender Series, knocking out the favorite Shannon Clark as a heavy underdog, but her official UFC debut lasted 100 seconds before a head kick put her down. An early prelim in Las Vegas that tests floor against ceiling. The market has Chaves near, Duben around.
FLOOR vs CEILING
Chaves Has a Floor. Duben Has a Ceiling. Over Three Rounds, Floor Wins More.
Jeisla Chaves earned her UFC spot the hard way. At the Contender Series in September 2025, she took on Sofia Montenegro in a bloody 15-minute war, got taken down and punished from the top in the final round, got back up, came forward, and took a split decision. Dana White was so impressed he signed both fighters. That's the kind of fight that tells you more than any record — Chaves has a floor. She's already lived the worst-case scenario: real adversity, real damage, and she still found a way to win. At 29 years old, she arrives 6-0, and the record is more aggressive than it looks: four wins by KO/TKO (including her pro debut, a knockout in round one over Josiane Ribeiro) and only two decisions. She finishes, but she also knows how to go the distance. On the other side, Yuneisy Duben is a pure finisher: six wins, all stoppages, five by strikes and one by armbar, none of them making it past round two. That's explosive power and a real hunter's instinct. And she's already proved that power at the UFC showcase level: at Contender Series Season 8, she walked in as a heavy underdog against the favored Shannon Clark and turned off the Canadian with a right overhand in 1:13. That's not regional-level violence — that's a legitimate showcase finish. The problem isn't a lack of talent. It's what happens when the early knockout doesn't land. In her official Octagon debut in March 2025, Duben took a head kick and went down in one minute and 40 seconds. The question in this fight isn't who hits harder. It's what happens if it gets past the first round. Duben has never been in deep water. Chaves lives there and wins when the water rises.
Truth A
Jeisla Chaves arrives 6-0 and demonstrated the rarest attribute in the sport: the ability to win after getting hurt. Against Sofia Montenegro she got taken down and hammered in the final round, got back up, and took the cards. But make no mistake — she's not just a point fighter: four of her six wins came by KO/TKO, with stoppages via ground-and-pound as late as 4:31 of round three (the Rebeca Sousa fight). In a three-round fight, a fighter who can dictate pace, finish when the opportunity opens, and still survive adversity has an enormous structural edge.
Truth B
Yuneisy Duben is a natural born finisher: six wins, all stoppages, five by strikes and one by armbar, with genuine heavy hands. And her ceiling isn't just regional — she knocked out the favored Shannon Clark on the Contender Series as a heavy underdog to earn the contract. That ceiling is terrifying in the first five minutes, and Chaves has already shown she can be taken down early (it happened against Montenegro). But that ceiling comes with a price: Duben has never been past round two in her career, has never won by decision, and in her official UFC debut she took a head kick and went down at 100 seconds against Carli Judice. No Plan B, no deep rounds on the resume.
Tale of the Tape
Chaves was born in Feb 1997. Duben is listed at 28 years old on UFC.com. Same age bracket, no real age edge either way. Both in their physical prime.
Chaves is five centimeters taller. Clear height advantage for managing distance.
Chaves has five centimeters of extra reach. The longer jab favors the Brazilian's distance control.
Stance not confirmed in any official source for either fighter. Both work pressure-forward striking.
Gomes Fight Team in Brazil vs Pound 4 Pound Muay Thai in Littleton, Colorado (coach Justin Houghton). Different-sized camps, Muay Thai base on both sides.
Current Form
Jeisla Chaves
Dana White's Contender Series. A bloody 15-minute war. Got taken down and punished in R3, got back up and took the cards (29-28, 28-29, 29-28). UFC contract secured.
Split DecisionDemo Fight 21. Late stoppage, finished her opponent by ground-and-pound at 4:31 of round three. Proof of cardio and accumulated pressure.
TKO R3 (punches, 4:31)Gomes Fight Championship. Won on the cards over three rounds, showing she can go the distance and dictate the pace when needed.
DecisionGomes Fight Championship 10. TKO via ground-and-pound in R1 (4:49) for the regional title. Took it to the mat and finished from top.
TKO R1 (ground-and-pound, 4:49)King Fight 1. TKO via ground-and-pound in R1 (2:30). Took the fight to the mat and closed it out quickly.
TKO R1 (ground-and-pound, 2:30)Gomes Fight Championship 8. Professional debut, KO in R1 (punch) over Josiane Ribeiro. Started her career by knocking someone out.
KO R1 (punch)The trajectory of a fighter who only knows how to win. Chaves arrives at the UFC undefeated in six fights, built through the Brazilian regional circuit and capped off by the biggest win of her career at Dana White's Contender Series in September 2025. That night she took on Sofia Montenegro in a 15-minute war, got taken down and punished from the top in round three, recovered, and took a split decision — earning a contract in the process (Montenegro was signed too, that's how good the fight was). Before that, she came off a TKO stoppage in round three against Rebeca Sousa (Apr 2025), a decision over Marcela Silva (Jul 2024), and two first-round TKO stoppages via ground-and-pound (Siddhi Vieira in Apr 2024, for a regional title, and Raila Almeida in Mar 2024). It all started with a KO in round one over Josiane Ribeiro, her professional debut in April 2023. She trains at Gomes Fight Team. At 29 years old, she's physically in her prime, has long reach for the division (171 cm), and a record that mixes knockout finishes (four of six) with the ability to go a full three rounds when needed.
Yuneisy Duben
Official UFC debut (Vegas 104). Judice landed a head kick early and stopped Duben at 1:40 of R1. First career loss.
TKO R1 (head kick, 1:40)Dana White's Contender Series Season 8. Entered as a heavy underdog against the favorite and turned the lights off on the Canadian with a right overhand at 1:13. Earned her UFC contract on the spot.
KO R1 (overhand, 1:13)TKO in R1 (3:58) by corner stoppage. Pressure and volume forced the corner to throw in the towel.
TKO R1 (corner stoppage, 3:58)TKO in R1 (1:07) via head kick. 300 Sparta 34 in Peru, for the promotion's strawweight title.
TKO R1 (head kick, 1:07)Submission in R1 (1:18) by armbar, at 300 Sparta 31 in Peru. The only submission win on her record.
Sub R1 (armbar, 1:18)A track record of raw power that ran into the deep rounds. Duben built a career as a pure finisher: six wins, all stoppages, none going past round two. She started in 2019 fighting in Peru (300 Sparta and Inka FC) with a string of knockouts and an armbar, then stepped away for years before returning in 2024. The high point came at Dana White's Contender Series Season 8 in September 2024: entering as a heavy underdog against the favored Shannon Clark, Duben landed a right overhand and turned the lights off on the Canadian in 1:13, earning a UFC contract on the spot. But her official Octagon debut, in March 2025 against Carli Judice, changed the story: Judice landed a head kick early and stopped Duben at one minute and 40 seconds — the only loss of her career. Venezuelan from Valencia, now based in Littleton, Colorado, she trains at Pound 4 Pound Muay Thai under coach Justin Houghton alongside UFC names like Miranda Maverick and Rose Namajunas. She has heavy hands and a hunter's instinct, but she's never been in a deep round and has never won by decision.
Level of Competition
No direct common opponents. The two come from entirely separate regional circuits — Chaves from Brazil, Duben from Peru and the United States — and, interestingly, both earned their UFC contracts through the same door: Dana White's Contender Series. Chaves' best win is Sofia Montenegro, a fighter good enough to earn a contract on the same night, in a competitive 15-minute war where Chaves went through real adversity and won on the cards. Duben's best win is the KO over Shannon Clark at the same DWCS, where she entered as a heavy underdog and turned off the favorite at 1:13 — a legitimate showcase-level win, not a regional one. Where the scale tips toward Chaves isn't the ceiling of the best win, which is roughly comparable — it's what each fighter did afterward: Chaves proved she has a floor (survived adversity and won on the cards), while Duben's official UFC debut ended in a loss by head kick at 100 seconds. Both have showcase ceilings; the difference is only one of them has shown she can still win when the fight doesn't end early.
Statistical Comparison
Sig. Strikes per Minute
SAMPLE NOISE. Duben's high number comes from fights lasting under two minutes — it's not sustained volume. Chaves' 5.67 was built across the 15 minutes against Montenegro.
Strike Accuracy (%)
Chaves 51% (DWCS/UFC), Duben 49%. Near-identical accuracy. Chaves' number comes from a full fight, Duben's from quick explosions.
Strikes Absorbed/Min
Chaves absorbs less per minute. Duben's 10.75 is also an artifact of very short fights, but the head kick from Judice shows she's hittable early.
Strike Defense (%)
Chaves at 60% strike defense (measured over the 15 minutes against Montenegro). Duben's stat not reliably published due to minimal sample.
Takedowns per 15 Min
Neither fighter is a wrestling-based fighter on their record. Chaves has two ground-and-pound stoppages and used the clinch against Montenegro. Duben has not recorded any takedowns in the UFC.
Takedown Accuracy (%)
Chaves has more of a history of taking the fight to the mat and finishing there (two ground-and-pound stoppages). Duben has shown no takedown game.
Takedown Defense (%)
KEY STAT. Chaves at 75% takedown defense (UFC/DWCS), elite at the regional level. Duben has no published takedown defense data and has never defended a shot at UFC level.
Chaves leads in 6 categories · Duben leads in 1
Win & Loss Distribution
Wins
KO/TKO
Submission
Decision
Win profiles that are closer than they look. Chaves splits her six wins across four by KO/TKO (the pro debut over Josiane Ribeiro, two ground-and-pound stoppages, and the late TKO over Sousa) and two by decision (Marcela Silva and Montenegro). In other words, she's more of a finisher than a points fighter — but she's the only one of the two who has also won by going the distance. Duben is a pure finisher: six wins, five by KO/TKO and one by armbar, zero decisions, and nothing went past round two. For method betting, this recalibrates the read: Chaves isn't necessarily going to the cards — she can finish Duben. But against a UFC-caliber opponent, with Chaves' takedown defense and cardio, the decision is still the most likely outcome because Duben only knows one path (early finish) and if that path doesn't open in R1, she's in territory Chaves controls.
Losses
KO/TKO
Submission
Decision
Small sample on both sides. Chaves has never lost as a professional (6-0), so there's no documented vulnerability pattern — but it's worth noting she was taken down and hurt against Montenegro and still didn't break. Duben has exactly one career loss, and it's revealing: TKO by head kick at one minute and 40 seconds against Carli Judice in her official UFC debut (Mar 2025). That was the first time her fight lasted more than a few seconds without her landing the knockout, and the result was her being stopped. For method betting, the loss history suggests Duben is more vulnerable to getting stopped early than to losing a decision — simply because she's never come close to one. And Chaves, who has never been finished, is exactly the type of patient fighter who can exploit that.
Skills Profile
Chaves
vs
Duben
Pace Control and Distance Management
+2 Chaves
Chaves dictates pace, uses the clinch and ground-and-pound, has longer reach. Duben is an explosive brawler with no documented Plan B for deep rounds.
Early Knockout Power
+2 Duben
Duben has real power in her hands — five TKO stoppages on her record, and that right overhand shut down the favored Shannon Clark at DWCS in seconds. When it lands, it lands for real.
Cardio and Deep Rounds
+3 Chaves
Chaves went a competitive 15 minutes against Montenegro and finished a fight at 4:31 of round three against Sousa. Duben has never been past round two in any fight in her career.
Resilience Under Adversity
+3 Chaves
Chaves got taken down and punished against Montenegro and won anyway. Duben went down to a head kick 100 seconds into her UFC debut. Floor versus no floor.
Ground Game and Clinch
+2 Chaves
Chaves has two ground-and-pound stoppages and a clinch game. Duben has shown no offensive ground game beyond a single armbar in 2019.
Quality of Competition Cleared
+1 Chaves
Even on ceiling: both have beaten someone of contract-earning quality (Chaves went 15 minutes with Montenegro and won, Duben knocked out the favored Clark at DWCS). Slight edge to Chaves for the competitive 15-minute win.
Duben has a real and dangerous window in the first five minutes: heavy hands, a hunter's instinct, and the fact that Chaves has already been taken down early (it happened against Montenegro). And it's not just regional-level power — she shut down a showcase-level favorite at DWCS. But outside that window, almost everything points to the Brazilian. Chaves is bigger, has more reach, controls the pace better, has top-game ground-and-pound, and — most importantly — has already proven she wins when the fight gets ugly and long. Duben has never been past round two, and the one time her Octagon fight didn't end early in her favor, she was the one getting stopped. This fight is a race between Duben landing the bomb early or Chaves dragging it into deep water where the Venezuelan has never swum.
Final Prediction
The Thesis
The thesis: Jeisla Chaves wins because she has the highest floor in this fight (survived real adversity against Montenegro and took the cards anyway), she's the only fighter in this matchup with a proven track record of winning by going the distance, and she still brings finishing power to the table (four of six wins by KO/TKO). Duben has a dangerous ceiling in an early knockout — proven even at the showcase level with the Clark finish at DWCS — but she's never made it past round two and her official UFC debut ended with her getting stopped by a head kick at 100 seconds.
The thesis: Jeisla Chaves wins because she has the highest floor in this fight (survived real adversity against Montenegro and took the cards anyway), she's the only fighter in this matchup with a proven track record of winning by going the distance, and she still brings finishing power to the table (four of six wins by KO/TKO). Duben has a dangerous ceiling in an early knockout — proven even at the showcase level with the Clark finish at DWCS — but she's never made it past round two and her official UFC debut ended with her getting stopped by a head kick at 100 seconds.
This collapses if Duben finds the right hand or a clean head kick in the first five minutes.
Conviction
Conviction 6 (not 7) because the lean toward Chaves winning is strong based on cardio, demonstrated floor, and comparable competition level — but there's a concrete upset path: Duben's early KO power is real and was displayed at the showcase level, and Chaves has already shown she can be put down and hurt early against Montenegro. The Venezuelan's ceiling in R1 prevents inflating this to 7. The correction on Chaves' record (four of six by KO/TKO, not roughly half) doesn't change the winner or collapse the conviction, but it makes 'Decision' less locked-in as the method: her finishing ability is viable, so the decision is the single most likely outcome, not the only one. That's why the winner pick stays at 6 and the method is presented honestly.
What Breaks This Pick
- 01
Duben lands the heavy right hand or a clean head kick in the first five minutes before the fight stretches out
- 02
Chaves repeats the vulnerability of being taken down and punished early, as happened against Montenegro, but this time doesn't recover
Underdog Path
Duben hunts the finish in R1: preserved heavy hands, landing the right overhand or a head kick when Chaves closes the distance. The KO over the favored Shannon Clark at DWCS and the collection of early stoppages show the hunting instinct is real and works against quality opposition — and Chaves has already shown she can be put down early (she suffered exactly that against Montenegro).
Required Conditions
- Land the heavy right hand or a clean head kick in the first five minutes
- Don't let Chaves drag the fight into R2 and R3, where Duben has never competed
- Stay away from the clinch and Chaves' top-game ground-and-pound
— Precedent: Duben KO'd Shannon Clark with a right overhand at 1:13 (Sep 2024), as a heavy underdog, showing that her power finishes even-odds showcase fighters. But it's worth noting that even that knockout came early — the problem has never been her ceiling, it's been what happens when the knockout doesn't arrive. In her official UFC debut, the fighter who got stopped by a head kick at 1:40 was Duben herself.
Verdict
Winner
Jeisla Chaves
Method
Decision
Most Likely
- 01
Method
Chaves by Decision
The single most likely outcome: Chaves is the only fighter here who has won by going the distance (two of six by decision, went a competitive 15 minutes against Montenegro) while Duben has never won by decision or been past round two. Honest caveat: Chaves' record is more finish-heavy than it looks (four of six by KO/TKO), so her finishing ability is viable and the lean toward a decision isn't locked in. Still, against a UFC-caliber opponent, controlling rounds and winning on the cards is her cleanest path — Duben simply has no route to a decision victory.
- 02
Total Rounds
Fight goes over 1.5 rounds (Over)
Duben only finishes early or loses control of the fight. Chaves has never been finished and has already survived a rough opening against Montenegro. The trend is for the fight to get past R1 and fall into territory Duben has never competed in. Be careful if the bomb lands early.
- 03
Winner
Chaves
Implied around 80%, estimated at 62%. The market is overpaying. Taking Chaves straight has no value — better to go through the method or parlay her with another favorite on the card.
- 04
Underdog Method
Duben by KO/TKO in R1
A contrarian, high-risk play. Only works if Duben lands the heavy hands or a clean head kick in the first five minutes. The power is real and has already turned off a showcase-level favorite at DWCS, but her whole career is essentially a R1 bet. Real probability 25-30%. Coverage on her power ceiling, not a direct value play.
Most Likely Outcome
Chaves by Decision
Best combination of probability and price in this fight: it stacks the main pick (Chaves wins) with the single most likely method (decision), since she's the only fighter here with deep-round history and Duben has never won by decision or gone past round two. Caveat: Chaves' record is four of six by KO/TKO, so her finishing ability takes a real slice of that probability, meaning the decision edge is solid but not massive. Implied is 36% and the estimated real probability sits around 38-42% based on the structural profile. Real edge, with Chaves potentially finishing as upside in the same direction.
Stats That Matter
0 of 6
Duben fights that went past R2
All six wins came via stoppage in R1 or R2. She has never been in a deep round. In a three-round fight, that's completely uncharted territory.
4 of 6
Chaves wins by KO/TKO
The record is more aggressive than it looks: four KO/TKO stoppages and only two decisions. She finishes fights — she's just the only one of the two who has also won by going the distance.
1:40
Time before Duben was stopped in her official UFC debut
TKO via head kick against Carli Judice (Mar 2025) — the only time her fight didn't end in her favor early.
Chaves odds consensus
Implied around 80%, estimated at 62%. The moneyline has no value here — the edge is in the method.
The Trap
Trap: Duben by KO at Big Odds
The method market is going to pay big on "Duben by KO/TKO" based on her five stoppage wins, and this time the argument carries more weight than usual — because one of those finishes came over the favored Shannon Clark at DWCS. But there are two cracks in that foundation. First, the power is real but the sustainability isn't: every single fight on her record lasted under two rounds, she's never had to maintain a gas tank. Second, the one time her fight didn't end in the first seconds without a knockout landing, against Carli Judice, it was Duben herself getting stopped by a head kick at 100 seconds. Chaves has never been finished in six professional fights and has the reach advantage to keep the Venezuelan off the range she needs to land that bomb. Betting the specific Duben finish at inflated odds is betting the bomb lands in R1 — and if it doesn't, the ticket is dead.
COLISEUM - Statistical and tactical analysis. Data sourced from ufcstats.com and public sources.
Jeisla "A Braba" Santos Chaves vs Yuneisy Duben | UFC Fight Night: Muhammad vs Bonfim | June 6, 2026 | Meta APEX, Las Vegas