LAS VEGAS -- 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.The 38-year-old Brazilian landed 28 of the 45 significant strike attempts, while Ankalaev, 33, was only able to land four of his nine attempts.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.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 ...