Paddy Pimblett and Colby Covington had to be restrained by security following an ugly backstage altercation at UFC 314.
Liverpool-born Pimblett stopped Michael Chandler in the third round in Florida to record the biggest victory of his UFC career.
The 30-year-old called out a major UFC name in his post-fight interview, and has moved into the top 10 of the lightweight rankings for the first time.
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He defeated Chandler in front of US President Donald Trump, who was attending the event with Elon Musk and other members of his entourage.
The highly-controversial UFC star Colby Covington was also present in Florida - and had an ugly exchange with Pimblett backstage that prompted security to step in to separate the pair.
After Covington aimed some brutal remarks in Pimblett's direction, 'The Baddy' shouted back: "I'm gonna slap you. Zip your shirt up, you little ... What are you on, a three-fight losing streak? You little maggot, keep putting your act on."
Covington was eventually led away by on-site security while Pimblett continued mocking his rival.
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Pimblett also called out Conor McGregor after the Irishman claimed he bet $50,000 on Chandler to knock him out during their match at UFC 314.
He said: "If you wanna come back, Con, I'm here son. I'm waiting.
"I'd mufty you just like I've just muftied Chandler.
"I don't think Conor is ever coming back," he continued. "He's got enough money, he doesn't need to come back. But if he does, 'The Baddy' is waiting for him."
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Elsewhere on the UFC 314 card, Australian star Alexander Volkanovski defeated Diego Lopes via unanimous decision to win the vacant Featherweight Championship.
Jean Silva also defeated Bryce Mitchell via second-round submission to share the Performance of the Night award with Pimblett, as well as extend his UFC winning streak to 5-0.
Topics: Paddy Pimblett, Colby Covington, UFC
Ryan Smart