Tommy Fury and Jake Paul have had to be pulled apart at a weigh-in ahead of their clash in Saudi Arabia on Sunday.
The boxers traded insults and pushes as they squared up hours before their blockbuster fight – billed as “The Truth”.
Their long-standing feud will finally conclude at the Diriyah Arena after two previous scheduled matches had to be cancelled.
Fury, 23, was joined in his corner on stage by half-brother and heavyweight champion, Tyson Fury.
The former Love Island contestant told journalists: “Tomorrow night, his time is up. Jake Paul will no longer be boxing.
“I’m going to put this guy away in four rounds.”
But Paul, 26, has claimed Fury was performing for the cameras.
Who is Jake Paul, the YouTuber-turned-boxer taking on Tommy Fury?
Jake Paul v Tommy Fury: When is the fight billed as ‘The Truth’ and how to watch it
Tommy Fury branded ‘boxing’s biggest b****’ after withdrawing from Jake Paul fight
“He’s acting on stage, getting all hyped up, trying to act like his brother.
“This professional boxer is going down; it’s easy, it’s simple.”
And Paul accused his rival of being nervous ahead of their meeting while insisting he was “ready, calm, cool and collected”.
“This is what I do. He’s shaking up on stage; you can see the nerves running through his system.
“I’m chill,” he added.
Be the first to get Breaking News
Install the Sky News app for free
Read more:
Tommy Fury: Everything you need to know about the Love Island star and boxer
Jake Paul: How did the internet star go from viral videos to a career in the ring?
The victor will win a newly-made World Boxing Council Diriyah Belt.
They will also claim a place in the cruiserweight ranking – a decision that has sparked controversy due to Paul’s background as a YouTuber.