Devin Haney's surprise defeat by Ryan Garcia sent shockwaves through the boxing world, with plenty of punters losing out after the bombshell result.

And UFC superstar Israel Adesanya will surely be reeling after losing big on Saturday night's fight.

Adesanya publicly backed reigning champion Haney prior to the mega-fight in Brooklyn, showing off his betting slip to his 1.8million followers on Twitter - now known as X.

The former middleweight champion backed Haney to knock out Garcia, putting $20,000 on the outcome.

Had his prediction come to fruition, he would have pocketed just over $40,000.

As it was, Garcia shocked Haney to win on points, knocking the champion down on numerous occasions on his way to victory.

However, with Garcia weighing in 3.2 pounds over the 140-pound weight limit, Haney remains the champion.

A dejected Haney took to social media to share his thoughts on his surprise defeat.

'Alhamdulillah Allah is the perfect planner he makes no mistakes.. fought like a true champion,' he said. 

'Got up off the canvas & kept fighting. I am 100% ok & would love to do it again while we both make weight.'  

'God did it,' Garcia told screaming fans after dropping the heavily favored Haney three times en route to a majority-decision win. 'My heavenly father Jesus Christ, I give you all the glory.'

As for his bizarre antics leading up to the fight — troubling behavior that ranged from flirting with reporters to threatening sexual violence on attendees at Friday's weigh-in — well that was all Garcia's doing.

'Come on, guys, you really thought I was crazy?' Garcia asked the crowd following boxing's biggest upset of 2024.

But if all of his antics were part of some elaborate act, Garcia was still in character early Sunday morning. At his post-fight press conference, he admitted that he drank every night leading up to the bout.

'I walked through the fire and still held it down and still beat f***ing Devin Haney,' he said alongside promoter Oscar De La Hoya. 'And [I] still drank every day and I beat him. And I smoked. What the f***?'

Garcia's revelation was met with applause from his entourage at the post-fight press conference, but he quickly added that he's 'not necessarily proud of that.'