John Fury pulled his shirt off and joined his son Tommy in calling out bitter rival Jake Paul.
Tommy was taken the six-round distance by late-replacement opponent Rolly Lambert on the undercard of Floyd Mayweather's exhibition bout with YouTuber Deji. And immediately after the fight, John ripped off his shirt and confronted Paul who was ringside commentating on the event.
He was soon joined by Tommy with both parties demanding the other join them in or out of the ring. Neither obliged as they instead traded insults and the row was eventually defused as talk continues over a potential fight between Tommy and Paul.
"You're a miserable old man. Come fight me right now then," Paul yelled at Fury Sr who responded: "Forget my son, I'm the king of the bare-knuckle man." The 58-year-old was then joined by his son who chimed in with: "There's a certain b**** from ringside that I want in the ring now. Tell him to get in here because he would never have the b**** to get in here and fight a man of this calibre on a few hours notice."
The rivals have been scheduled to fight twice but on each occasion Fury was forced to pull out, first with a broken rib last December and then again three months ago when he was banned from flying to America for a press conference.
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Paul has since beaten UFC legend Anderson Silva, outpointing the Brazilian over eight rounds in Arizona last month. Fury, meanwhile, fought on his brother Tyson's undercard in April before the heavyweight world champion knocked out Dillian Whyte.
He was due to take on Paul Bamba this weekend but a row erupted over the weight when Fury scaled seven pounds more than his opponent. Bamba refused to accept the fight which left the organisers scrambling to find a replacement.