Heavyweight Jeamie Tshikeva angrily flipped a table and left the stage after a heated exchange with fellow Briton David Adeleye in a chaotic news conference.
The pair will fight for the vacant British title at Manchester's Co-op Live Arena on Saturday.
Adeleye and Tshikeva - known as TKV - were kept apart during a row in a media interview earlier in fight week, but the argument escalated at Thursday's event.
"This persona he's putting on, this bad-boy persona... we're both educated men," TKV, 31, said.
"We're both raised by great parents. Are you an academic gangster? I don't know where this gangster persona comes from, brother."
Adeleye, 28, took offence to suggestions he was scared, and targeted a member of his opponent's team by saying they looked like comedian Harry Hill.
"There's only one way to settle this - fight," promoter Frank Warren said in reference to Hill's catchphrase.
The quip did little to ease the tension as Adeleye and TKV both became visibly irate.
"I'm going to hurt you, Jeamie, trust me," Adeleye said before banging his fist on the table.
TKV stood up and overturned the table, before security held both men back and Warren told them to "calm down".
The event continued without the usual face-off after TKV departed.
Joyce & Hrgovic both predict KO wins
Saturday's card will be headlined by British heavyweight Joe Joyce's fight with Croatian Filip Hrgovic.
Joyce, 39, was originally scheduled to fight Dillian Whyte before the Londoner withdrew because of an injured hand.
"I look forward to knocking [Hrgovic] out," Joyce said, adding a win will take him back into world-title contention.
Once tipped to be a future heavyweight champion, Joyce's career was derailed after he was stopped twice by Zhilei Zhang in 2023 before losing to Derek Chisora in his last outing in July.
Hrgovic, 32, suffered a first career defeat in 18 bouts against Daniel Dubois in June.
He labelled Joyce as being "slow" and also predicted a stoppage victory.
