LAS VEGAS (AP) - Fan favorite Alex Pereira dethroned Magomed Ankalaev at UFC 320, taking the light heavyweight championship with a first-round stoppage Saturday night .

Pereira (13-3-0) floored Ankalaev (21-2-1) after hurting him with a huge right hand and quickly went to work using thunderous elbows during a ground-and-pound before referee Herb Dean stepped in to stop the bout at the 1:20 mark.

Pereira brought an end to Ankalaev´s 14-match unbeaten streak, while exacting revenge for a loss in the fighters´ first meeting in March.

"I wasn´t well that night, but tonight I was very well," Pereira said through his translator.

Pereira lost to Ankalaev by unanimous decision on March 8, when the judges graded the fight on aggressiveness. This time, Pereira wasted no time in attacking Ankalaev with relentless pressure.

Pereira closed +200 at BetMGM Sportsbook, which means a $100 wager would have won $200. A Pereira by KO or TKO in under 2.5 rounds was +475.

Alex Pereira, of Brazil, celebrates after defeating UFC light heavyweight champion Magomed Ankalaev, of Russia during the UFC 320 mixed martial arts bout Saturday, Oct. 4, 2025, in Las Vegas. (Steve Marcus/Las Vegas Sun via AP)

While Pereira entered the arena with the sold-out crowd standing and roaring in approval, Ankalaev was greeted by a chorus of boos.

The 19,081 in attendance, which included Golden State Warriors stars Draymond Green and Jimmy Butler and Los Angeles Rams wide receiver Puka Nacua, went into a frenzy the moment Dean stepped in to stop the fight.

Earlier in the night, in what some might have considered a title eliminator bout in the light heavyweight division for the right to face Pereira, second-ranked contender Jiri Prochazka (32-5-1) delivered a brutal left hand at the 3:04 mark of the third round to knock out No. 4 Khalil Rountree Jr. (15-7-0) in what earned the fight of the night.

Pereira had beaten Prochazka twice already, second-round knockouts at UFC 295 and 303.

In the co-main event, champion Merab Dvalishvili (21-4-0) successfully defended his bantamweight title with a unanimous decision (49-45, 49-45, 49-46) over Cory Sandhagen (18-6-0). Dvalishvili, who strengthened his argument a Fighter of the Year contender, registered a UFC record for takedowns landed (20) with 37 attempts. His victory extended the division´s longest-ever win streak at 14 fights.

In their scheduled three-round featherweight bout, the stunned crowd watched No. 9 contender Youssef Zalal (18-5-1) top No. 8 Josh Emmett (19-6-0) by way of verbal submission at 1:38 of the first round with a wicked arm bar.

In the scheduled three-round middleweight bout, Joe Pyfer (15-3) came out aggressive in the second rout with two quick punches to drop Abus Magomedov (28-7-1), and then dominated on the ground until winning by submission via rear naked choke at the 1:44 mark.

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Alex Pereira, of Brazil, leaves the Octagon after defeating UFC light heavyweight champion Magomed Ankalaev, of Russia, during UFC 320 Saturday, Oct. 4, 2025, in Las Vegas. (Steve Marcus/Las Vegas Sun via AP)

Alex Pereira, right, of Brazil, hits UFC light heavyweight champion Magomed Ankalaev, of Russia, as the referee looks on during the UFC 320 mixed martial arts bout Saturday, Oct. 4, 2025, in Las Vegas. (Steve Marcus/Las Vegas Sun via AP)

Jiri Prochazka, top left, of Czechia, knocks out Khalil Rountree Jr., bottom, of the United States, in a light heavyweight bout during UFC 320, Saturday, Oct. 4, 2025, in Las Vegas. (Steve Marcus/Las Vegas Sun via AP)

UFC bantamweight champion Merab Dvalishvili, of Georgia, celebrates after defeating Cory James Sandhagen, of the United States, during UFC 320 Saturday, Oct. 4, 2025, in Las Vegas. (Steve Marcus/Las Vegas Sun via AP)

Pereira dethrones Ankalaev with a 1st-round stoppage at UFC 320