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UFC featherweights Arnold Allen and Melquizael Costa on a white and black background
Results

Main Card Results | UFC Fight Night: Allen vs Costa

Live Results, Highlights, Post-Fight Interviews With The Main Card Winners And More From UFC Fight Night: Allen vs Costa, Live From Meta APEX In Las Vegas, Nevada On May 16, 2026

Following an exciting collection of preliminary card matchups, business at the Meta APEX picked up as the action shifted to the main card, where every fight had the fans in attendance and those watching at home on the edge of their seats. Four of the first five bouts ended inside the distance before Arnold Allen and Melquizael Costa closed out the show in a pivotal featherweight main event.

If you happened to miss any of the action, get caught up with our fight recaps below.

MORE: Prelim Results | Official Scorecards

Main Card Results, Highlights & Interviews:

Main Event: Arnold Allen defeated Melquizael Costa by unanimous decision (50-45, 50-45, 49-46)

Arnold Allen showed his class in Saturday’s finale, securing a unanimous decision win over Melquizael Costa that cemented his standing in the division and halted the Brazilian’s rise.

Arnold Allen Post-Fight Interview | UFC Fight Night: Allen vs Costa
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Arnold Allen Post-Fight Interview | UFC Fight Night: Allen vs Costa
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From the outset, Allen fought with great urgency and intensity that he hadn't in his last few contests, closing the distance almost immediately and spinning Costa to the canvas with a left hand early in the first. The surging Costa did his best to run level with the British staple, showing good scrambling ability on the ground and solid striking of his own, but the power difference was readily apparent and the real differentiator, as Allen routinely landed the more telling blows throughout the contest.

After 25 entertaining minutes, the judges were tasked with determining the victor and all three officials scored the fight in favor of Allen. The win steadied the Brit in the shifting featherweight ranks, keeping him inside the top 10 while showing he remains an elite competitor on the fringes of the title picture.

DooHo Choi defeated Daniel Santos by TKO (strikes) at 4:29 of Round 2

DooHo Choi registered his third straight win and third straight finish in Saturday’s co-main event, finishing Daniel Santos with a thudding shot to the body late in the second round.

Dooho Choi Stops Daniel Santos In Round 2 | UFC Fight Night: Allen vs Costa
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Dooho Choi Stops Daniel Santos In Round 2 | UFC Fight Night: Allen vs Costa
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The featherweights came out firing from the jump, with Santos taking the fight to Choi, mixing up his targets well. But the South Korean veteran held his ground and landed responded with his signature technical striking, and as Santos faded in the second, Choi began to put it on the Brazilian, eventually flooring him with clubbing left hook to the body.

Dooho Choi Octagon Interview | UFC Fight Night: Allen vs Costa
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Dooho Choi Octagon Interview | UFC Fight Night: Allen vs Costa
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That’s now three straight finishes and a four-fight unbeaten streak for “The Korean Superboy,” who missed all of 2025 with a knee injury. He has been an all-action standout from the outset of his career and called for a matchup with Patricio Pitbull next, which sounds like an appetizing pairing.

Juan Diaz defeated Malcolm Wellmaker by submission (rear-naked choke) at 4:08 of Round 2

Juan Diaz rolled into his promotional debut and submitted Malcolm Wellmaker in the second round, instantly announcing himself as a fighter to watch in the bantamweight division.

Juan Diaz Octagon Interview | UFC Fight Night: Allen vs Costa
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Juan Diaz Octagon Interview | UFC Fight Night: Allen vs Costa
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The recent Dana White’s Contender Series graduate took a couple of minutes to get settled in the first, but once he warmed into the fight, Diaz was in control. He finished the first round getting the better of the exchanges and then in the second, Diaz forced a grappling entanglement, took the back, and laced up a rear-naked choke, forcing Wellmaker to tap.

Juan Diaz Submits Malcolm Wellmaker In UFC Debut | UFC Fight Night: Allen vs Costa
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Juan Diaz Submits Malcolm Wellmaker In UFC Debut | UFC Fight Night: Allen vs Costa
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Just an outstanding performance for the surging Peruvian newcomer, who moved to 16-1-1 with the win. He showed power and toughness in his DWCS appearance and a sharp ground game in this one, establishing the 27-year-old prospect as a well-rounded threat to track in the 135-pound weight class going forward.

Modestas Bukauskas defeated Christian Edwards by split decisions (28-29, 29-28, 29-28)

Modestas Bukauskas got himself back into the win column on Saturday, earning a unanimous decision win over game, short-notice replacement Christian Edwards.

Modestas Bukauskas Post-Fight Interview | UFC Fight Night: Allen vs Costa
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Modestas Bukauskas Post-Fight Interview | UFC Fight Night: Allen vs Costa
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The light heavyweights alternated between exchanging in space and battling in the clinch, both men showing good abilities in both phases. As the fight progressed and Bukauskas settled into his range, he began stinging Edwards, hurting him badly twice in the second round, but failing to find a finish. In the third, both men continued to trade, with Edwards earning top marks for his conditioning and ability to push the pace down the stretch.

When the tens and nines were totaled, it was Bukauskas who came out on the happy side of the split decision verdict, getting himself moving in the right direction again. That’s seven wins in nine starts since returning to the UFC for “The Baltic Gladiator,” who once again takes a step towards breaking into the top 15 in the light heavyweight ranks. 

Benardo Sopaj defeated Timmy Cuamba by submission (rear-naked choke) at 2:25 of Round 2

Benardo Sopaj returned from an extended layoff to secure his second straight UFC victory, dropping, hurting, and submitting Timmy Cuamba in the second fight of Saturday’s main card.

Benardo Sopaj Submits Cuamba In Round 2 | UFC Fight Night: Allen vs Costa
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Benardo Sopaj Submits Cuamba In Round 2 | UFC Fight Night: Allen vs Costa
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The young bantamweights flashed their speedy striking in the first round, with Sopaj ending the frame by shifting to his wrestling and threatening with a neck crank. They started the second exchanging on the feet, as Sopaj connected with a left hand that dropped the Las Vegas resident and opened the door for the Albanian fighter to swarm and eventually chase down the submission.

Benardo Sopaj Post-Fight Interview | UFC Fight Night: Allen vs Costa
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Benardo Sopaj Post-Fight Interview | UFC Fight Night: Allen vs Costa
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After opening his career on the wrong end of a highlight-reel finish in his short-notice debut, Sopaj has shown he belongs with back-to-back impressive wins. Just 25 years old and training with an outstanding group at the Allstars Training Center in Stockholm, “The Lion King” continues to show promise in the 135-pound ranks.

Khaos Williams defeated Nikolay Veretennikov by TKO (strikes) at 3:31 of Round 1

Khaos Williams kicked off the main card with a return to his finishing ways, hurting and finishing Nikolay Veretennikov in the opening round.

Khaos Williams Stops Veretennikov In Round 1 | UFC Fight Night: Allen vs Costa
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Khaos Williams Stops Veretennikov In Round 1 | UFC Fight Night: Allen vs Costa
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The welterweight veteran came out firing on Saturday, throwing thunder at the taller Kazakh fighter, eventually hurting him with a short left hand that sent him stumbling into the fence. From there, Williams recognized that Veretennikov was hurt and picked his spots, stinging him again before dropping him and securing the finish.

Khaos Williams Post-Fight Interview | UFC Fight Night: Allen vs Costa
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Khaos Williams Post-Fight Interview | UFC Fight Night: Allen vs Costa
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This was a much-needed return to form for the 32-year-old finisher, who halted a two-fight skid with the win and secured his fifth finish in eight UFC wins. Williams has always been an entertaining member of the welterweight ranks, and when he fights with this kind of urgency, he looks like a genuine threat.

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UFC Fight Night: Allen vs Costa took place live from Meta APEX in Las Vegas, Nevada on May 16, 2026. See the final Prelim & Main Card Results, Official Scorecards and Who Won Bonuses - and relive the action on UFC FIGHT PASS!