Islam Makhachev confirmed himself as the undisputed lightweight champion of the world after beating Charles Oliveira by submission in the second round at UFC 280 in Abu Dhabi on Saturday.

The finish from Makhachev (23-1) came at 3:16 in the second round with an arm triangle choke, ending Oliveira's 11-fight win streak.

Makhachev celebrated with revered former lightweight champion Khabib Nurmagomedov, who lifted him into the air. The victory was Makhachev's fifth straight win by submission.

The Russian's ground game combined with his skill and physicality was where he was dominant, despite Oliveira being aggressive on the feet.

Makhachev took down Oliveira twice from three attempts in a fight that barely lasted eight minutes, with the Russian dictating most of it.

"I knew this wouldn't be an easy fight. This guy always pushes," said Makhachev, who was practically preordained as part of 'father's plan' as the heir to Nurmagomedov's throne by his late father Abdulmanap, who coached him until his death in 2020.

"I just want to say, this is my belt for coach Abdulmanap. Many years ago, he told me to train hard and you're going to be champion."

Makhachev's probable next fight will be against UFC featherweight champion Alex Volkanovski, likely in February at UFC 284. Volkanovski, who was in attendance in Abu Dhabi, said "let's do it".

In the fight of the night, rising star Sean O'Malley defeated Petr Yan by a controversial split decision after three rounds in the bantamweight division. Yan completed six of 13 takedowns and had 97 strikes, but O'Malley's were more significant.

Aljamain Sterling retained the bantamweight title after beating former champion T.J. Dillashaw by TKO at 3:44 in the second round. Dillashaw was not aided by a first-round shoulder dislocation.

Dillashaw revealed after the fight he had popped his shoulder 20 times in training and UFC boss Dana White defended the decision to allow him to fight, when he said: "I had no idea. That's a problem. How could the Athletic Commission know if he doesn't tell us. It's not like he came in out of shape or looked injured... that's something he should have told us."