Dillian Whyte has been accused of demanding more money to take part in promoting his fight with Tyson Fury.
Whyte has been silent since Fury's promoter Frank Warren won the purse bid for the heavyweight world title clash with an offer of £31million.
The challenger has yet to sign the bout contract and has until Saturday to do so.
And Fury's co-promoter Bob Arum has claimed the delay is due to Whyte demanding payment for taking part in the build-up.
"He’s saying, ‘I want extra money to promote' [but] or position is, ‘We’re not gonna give it to you,'" Arum told Queensberry Promotions.
"Now, if the fight does enormously well, we’ll give you a taste at the back end where everybody has made money.
"But we’re not going to be put in a position where you’re threatening us that you’re not going to participate in the promotion.
"If he doesn’t, he’s a damn fool because there’s always tomorrow.
"Even if he loses the fight, by participating the promotion he builds his own image and his own career.
"And even more important is that he really needs the exposure from this big fight and his threat is that he’s not gonna avail himself of that exposure."
Fury and Whyte are due to clash on April 23 with Wembley Stadium the favourite to play host.
Should Dillian Whyte stay silent until fight night? Let us know in the comments section below
And Warren expressed his frustration with Whyte over the delay in putting pen to paper.
“That’s all we want to do, get on with it," he said last week. “He’s been bleating and moaning that it’s been 1,000 days - I think it’s more like 1,200 days - that he’s been waiting.
“Well he’s got his shot now and he’s getting a record purse for it, plus that carrot of £4m if he wins, so go for it.
“All the nonsense that’s gone down from Eddie Hearn about the deposit, the deposit has been paid. “The contract has been approved by the WBC and has been sent to them, so it’s up to Whyte’s people to send it back now. The ball’s in their court, absolutely.”
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