Derek Chisora interrupted a joint interview with himself and Deontay Wilder to call presenter Piers Morgan a 'c**t'.
Chisora and Wilder were appearing on Morgan's 'Piers Morgan Uncensored' show to promote their upcoming fight, which takes place at The O2 Arena on Saturday.
But their segment was briefly stopped in its tracks shortly after Morgan quizzed Wilder about his previous comments on Tyson Fury.
"I've said what I said," Wilder said. "Look, this segment is not about him. For my last time speaking, respect that. Understand? Respect it, and move forward."
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Morgan again pressed Wilder on how he previously appeared to have respect for Fury before clearly changing his mind.
But Chisora then interrupted to say: "Just tell him he's a c**t, and let's move on."
Morgan asked: "Who? Me or Tyson Fury?"
"You. Because you keep talking about someone we don't want to talk about. I'm fighting this man right here [Wilder]. Ask me something about him.
"You're just being one. Because you are one. Let's be honest."
Morgan hit back: "Really? Why are you bothering... why are you doing the show?"
Chisora suffered his most recent professional boxing defeat to Fury, with the now 42-year-old losing to 'The Gypsy King' via technical knockout in 2022.
He has since won his last three fights, against Gerald Washington, Joe Joyce and Otto Wallin.
Wilder, meanwhile, has lost three of his last five bouts since his first defeat to Fury in 2020 - including a loss in their trilogy bout - before defeating Tyrrell Anthony Hendon via seventh-round TKO last June.
Chisora has claimed he plans to retire after the bout regardless of the result, though told The Guardian's Donald McRae: "I've had so many friends who stopped boxing and they're not happy. They're depressed.
"I've been doing this since I was 16. Is it time to stop just because somebody says for your health? It's quite hard.
"Without it [boxing] you have no routine. But if you have a fight, then for two months you come on a routine.
"It don't matter what goes through your mind. The routine is there. So the drug in boxing is the training. It keeps you going through the ups and the downs."
Topics: Deontay Wilder, Boxing, Tyson Fury
Ryan Smart