History repeated itself at UFC 281 after Alex Pereira defeated Israel Adesanya to become the new middleweight champion of the world.Much like their 2017 rematch in kickboxing, Adesanya looked like he was on his way to victory before getting caught. The Nigerian-born Kiwi convincingly won the first few rounds, landing the cleaner shots on Pereira.However, 'Poatan' proved once again that he only needed one shot to change the outcome. In the fifth and final round, the Brazilian landed a massive left uppercut, forcing the champion to cover up. Pereira proceeded to unleash a brutal barrage of punches on Adesanya.Check out the finishing sequence in the clip below:Spinnin Backfist@SpinninBackfistAND NEW ALEX PEREIRA KNOCKS OUT ISRAEL ADESANYA IN ROUND FIVE #UFC281312487787AND NEW ALEX PEREIRA KNOCKS OUT ISRAEL ADESANYA IN ROUND FIVE #UFC281 https://t.co/Dvq8eIpUFVAfter several unanswered punches, referee Marc Goddard decided to step in with 2:01 remaining on the fight clock. 'The Last Stylebender' immediately went up to the official to protest the stoppage, but the fight was over.Pereira became the new UFC middleweight champion with only five professional MMA bouts under his belt. Here's how the pros reacted to the insane ending of UFC 281.UFC fighters react to Israel Adesanya vs. Alex PereiraFormer UFC light heavyweight champ Jon Jones congratulated Alex Pereira on the massive upset. Jones, of course, has a brewing rivalry with Israel Adesanya, so many could think that he was taking a subtle jab at his rival. However, it appeared that 'Bones' was only being sincere in his message to the new champion.BONY@JonnyBonesIt’s already yours Champ, Congratulations! Incredibly happy for you and your team. 🏾 twitter.com/ufc/status/159…UFC@ufcThere's a new king in the middleweight division #UFC2818427741There's a new king in the middleweight division 👑 #UFC281 https://t.co/Ts5Wsjwd0nIt’s already yours Champ, Congratulations! Incredibly happy for you and your team. 🙏🏾 🇧🇷 twitter.com/ufc/status/159…Welterweight contender Belal Muhammad addressed the big narrative of the fight. After three bouts across kickboxing and MMA, Israel Adesanya just couldn't find a way to beat Alex Pereira.Belal Muhammad@bullyb170Man had him almost finished in the first and he got finished in the last .. Alex may be his kryptonite127785Man had him almost finished in the first and he got finished in the last .. Alex may be his kryptoniteEx-UFC two-division titleholder Henry Cejudo pointed out that unpredictability is why MMA is such a "beautiful" sport. His sentiments were echoed by featherweight superstar Max Holloway, who was utterly surprised by the result.Henry Cejudo@HenryCejudoRespect to both @stylebender and Alex Pereira. What makes MMA such a beautiful game is a fight ain’t over til it’s over! Can’t wait to see the quadrilogy! #UFC2812066142Respect to both @stylebender and Alex Pereira. What makes MMA such a beautiful game is a fight ain’t over til it’s over! Can’t wait to see the quadrilogy! #UFC281Max Holloway@BlessedMMAThis sport man #UFC2817068569This sport man #UFC281Women's bantamweight champion Amanda Nunes sent her regards to her compatriot. 'The Lioness' was overjoyed to have another Brazilian UFC champion.Amanda Nunes@Amanda_LeoaBrazil has one more champ tonight! Congrats to pereira. 🏼🏼🏼🏼🏼🏼🏼3633247Brazil has one more champ tonight! Congrats to pereira. 👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼👏🏼Meanwhile, Khamzat Chimaev and Luke Rockhold have already started calling out the new champion. Earlier this year, Rockhold noted that the only way he'll come out of retirement is if Alex Pereira beats Israel Adesanya and he's presented a title shot. But, of course, that's a big if.Khamzat Chimaev@KChimaevLet me fight with this guy, 1 road finish him ⚔️🏼8603989Let me fight with this guy, 1 road finish him ⚔️✊🏼Luke Rockhold@LukeRockholdI’ll be back2742131I’ll be backStephen 'Wonderboy' Thompson, Cody Garbrandt, and Brian Ortega expressed how surprised they were. Garbrandt even claimed that he predicted the fight to end how it did.Stephen “Wonderboy” Thompson@WonderboyMMAOOOHHH MYYY GOOODNESSS!!!!!! #UFC28152127OOOHHH MYYY GOOODNESSS!!!!!! #UFC281Funky@BenaskrenHoly shit that was freaking wild!! Pereira got some serious power.77536Holy shit that was freaking wild!! Pereira got some serious power.Brian Ortega@BrianTcityBro that fight was crazy!! Lived every minute of it!!! Congrats @AlexPereiraUFC86952Bro that fight was crazy!! Lived every minute of it!!! Congrats @AlexPereiraUFCCody Garbrandt@Cody_NoloveCalled that shit!!!36119Called that shit!!!Meanwhile, Mike Jackson churned out a spicy take after the fight. 'The Truth' is convinced it was a bad stoppage and that Adesanya should have been given more time to defend himself. Derek Brunson agreed with Jackson's assessment.Mike Jackson, Esq.@TheTruthJacksonThat was a bad stoppage #UFC2813That was a bad stoppage #UFC281Derek Brunson@DerekBrunsonThought they could’ve let that fight go a little longer tbh #UFC2811496110Thought they could’ve let that fight go a little longer tbh #UFC281Check out more UFC 281 reactions below:D@darrentill2Congrats to Alex, unlucky Izzy you’ll be back. 🏻3991172Congrats to Alex, unlucky Izzy you’ll be back. 💪🏻Aleksandar Rakic@rakic_ufcHistory repeats its self.1116History repeats its self.Platinum Mike Perry@PlatinumPerryPreposterous power1938Preposterous powerBelal Muhammad@bullyb170Woooow 5th round2216Woooow 5th roundBelal Muhammad@bullyb170Khamzat is a terrible matchup for alex3514192Khamzat is a terrible matchup for alex