Tyson Fury has told rival Dillian Whyte to sign the contract for their heavyweight title fight after verbally agreeing to the bout.
Fury's co-promoter, Frank Warren, outbid Eddie Hearn with a massive £31million bid to win the rights of the bout last week.
Whyte has refused to address the fight being announced since Warren won the bid, with Fury mocking the mandatory challenger for not speaking up.
Matchroom Boxing boss Hearn hinted that Whyte is not talking about the fight until contracts have been signed by both sides.
And Fury responded to Hearn's comments by claiming Whyte's team are the side that may not take the fight.
"The man is a clown. You boys are the ones that may not take the fight. Sign the contract big boy," Fury told Whyte.
Warren's Queensberry's Promotions, who have already paid the deposit to the WBC, will promote the fight alongside Top Rank.
Hearn was outbid by £7m for rights of the bout, but the promote refused to act on his "ego" when bidding and stuck to his maximum budget.
And Hearn thinks Whyte may be intentionally avoiding Fury's call-outs to agitate 'The Gypsy King'
"I guess he's thinking until I get a contract, until everyone signs, until I get the date and the money's paid. I don't believe it, but we'll see,' he told iFL TV.
"He's ready, he's been training non-stop and by the way, you don't have to play to their tune you know. Tyson Fury, he wants interaction and he wants goading.
"He wants to see a reaction, he wants to get himself fired up in camp. Maybe Dillian Whyte won't say a thing until the fight, maybe we'll fight maybe we won't, you'll find out on the night.
"You haven't just got to play people's tunes. Dillian's never gonna play anyone's tune. I think it's quite funny 'where are you Dillian', nowhere, we're hiding."
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Fury's title defence against Whyte is being targeted to take place on April 23, with the Principality Stadium in Cardiff being a possible venue for to stage the bout.
Fury hasn't fought in the UK since signing an £80million deal with ESPN and Top Rank two years ago, with all five of his last bouts taking place Stateside.
And Hearn hopes that both Fury and Whyte can "turn up" and agree on terms to finalise the world title clash.
"It's a great fight. We'll see what happens. Hopefully he turns up, hopefully they both turn up because it's a really good fight," he continued.
"Let's just get the contracts in, let them pay their deposit and then every step is closer and closer. Sometimes you don't see the reality of the situations."
