The eagerly anticipated heavyweight clash between Tyson Fury and Anthony Joshua may not go ahead as Deontay Wilder has requested $20m to step aside.
Fury, 32, agreed to face British compatriot Joshua, 31, in a super bout in August.
But Wilder’s team forced an arbitration hearing which concluded he had a contractual right to face Fury for a third time and by 15 September.
Fury said Wilder “asked for $20m (£14m) to move over”, and added: “Looks like I will have to crack his skull again.”
Fury posted his message on Instagram over a video of Wilder working out with trainer Malik Scott.
Scott has also posted, stating Wilder “declined and had no interest in step-aside money”.
“He wants blood and not step-aside money,” Scott posted. “Retribution is upon us.”
As things stand, Joshua’s promoter Eddie Hearn has since stated the situation is now out of his control and has set Fury’s team a deadline of the end of the week to resolve their situation with Wilder.
For the first time since negotiations began, Hearn has admitted he is considering alternative plans, notably a contest between Joshua and Ukraine’s Oleksandr Usyk, who is mandatory challenger for the WBO title.
Joshua holds the WBO, WBA and IBF belts, meaning a bout with Fury would have been the first at heavyweight for all four world titles.