Tyson Fury has entered into a £100,000 side bet with rival Dereck Chisora ahead of their heavyweight clash on July 26.
At a bitter press conference in London, the Morecambe-based heavyweight challenged Chisora to put his money where his mouth is.
Londoner Chisora initially suggested a £10,000 bet with Fury, 25, on the outcome of their title eliminator at the Phones4U Arena in Manchester a week on Saturday.
But Fury said: “10 grand is chump money to me. I give the kids that to go to the shops. Make it winner takes all... or at least 100 grand.”
Chisora agreed and the two men shook hands.
The undefeated Fury unleashed a foul-mouthed tirade at his opponent at Monday’s unsavoury press conference at a cinema in west London.
Chisora said: “I must apologise on behalf of my opponent for his language.”
But the 6ft9ins Morecambe giant retorted: “I don’t give a f___ how many women and children are in the audience. We’re getting near to the fight and I’m in fight mode, kill mode.
“If you don’t like the channel, change the station.”
Fury beat Chisora on points in their previous battle for the British title in July 2011.
Since then Chisora has lost a world title challenge to Vitali Klitshcko and by fifth round knockout to David Haye, although he is on a winning streak of five coming into the rematch.
Fury meanwhile has extended his unbeaten record to 22-0 with 16 KOs.