Anthony Joshua celebrated his win against Kubrat Pulev with Floyd Mayweather – who travelled to London in support.
Mayweather was a ringside guest for the thrilling fight with Joshua ended with a beautiful one-two combination in round nine.
The boxing royalty was heard cheering AJ on and encouraging the champion to utilise his jab.
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Joshua scored four knockdowns on the way to closing out the show in devastating fashion, with Pulev laid out on the floor.
Before the headliner started, Mayweather gave the Brit star a rave review.
Mayweather told Sky Sports: “It’s always good to see some great boxing.
“The UK is a great place, great fighters, I’m proud of Anthony Joshua but it’s lights camera, actions.
“He’s one of the best heavyweights, got a gold medal before, his careers going great, two-time word heavyweight champion, he’s helluva’ fighter.
“Anything can happen in this world of boxing. One shot can end your career.
“He’s a great fighter, hell of a guy, gentleman and I respect his craft.”