Anthony Joshua had to be held back by security after reacting to a comment while heading back to his dressing room after losing to Oleksandr Usyk for a second time.
A courageous performance from Joshua in the rematch was in vain as the Ukrainian remained unbeaten to return his IBF, WBO and WBA heavyweight titles with a split decision win.
Joshua is shown to be all smiles after the fight, despite an impromptu, and bizarre, post-fight speech which suggested otherwise, but the moody quickly turned following a comment from a bystander.
The unnamed man, who it has been claimed by some to be a boxing referee, said: "Way to keep it professional."
Joshua immediately turns around and replies: "Who are you talking to? Who the f*** are you talking to?" His security intervenes as Joshua adds: "Are you mad?"
The camera pans around to the man in question, who looks quite stunned by the reaction and explains to those around him that he was just saying: "Way to keep it professional."
