Anthony Joshua continued to fight Jermaine Franklin after the final bell as tempers frayed between the rivals.
Joshua outpointed his American rival after 12 lacklustre rounds of his heavyweight comeback fight in London on Saturday night. But after the bout was brought to a close, Joshua tapped Franklin on the head before appearing to push his head into his opponent before the referee stepped in.
By then both men's corners had involved themselves in the ruckus before calm was restored with Joshua later apologising, referencing his meltdown following his rematch defeat by Oleksandr Usyk last August, saying: "Listen, last time I grabbed the mic it was a bit chaotic. So I'm calm, I appreciate every single person coming out this evening. Inside this squared circle, it's a different kind of energy in here so I apologise for anybody watching and seeing that type of stuff [at the end] because we're sportsmen.