Deontay Wilder has been branded "embarrassing" by Anthony Joshua's promoter Eddie Hearn.
The heavyweight world champion will take on Luis Ortiz for a second time later this year rather than take on Joshua in a unification clash.
And a frustrated Hearn hit out at the American and accused him deliberately sabotaging the fight.
He told iFL TV : "Joshua goes on ESPN yesterday and says,'I'll sit down with you after my fight and we’ll do a deal.'
"And he goes, 'S***. How can we look okay out of this? Oh yeah, I've signed a deal to fight Ortiz everybody.'
"What? That morning? It’s embarrassing, that’s what it is…
"Stop talking about Wilder, he’s a waste of time. They don’t want the fight, he’s been talked into doing something else.
"He’s not his own boss, he don’t make his own decisions, let him do what he’s been talked into.
"When he becomes available, after he’s fought Ortiz, after he’s fought [Adam] Kownacki, then I guess we’ll try again."
Joshua, meanwhile, is now on the lookout for his next opponent, assuming he beats Andy Ruiz Jr on Saturday.
And Hearn revealed there are three men in the running to face the Brit.
When asked about if a fight against Tyson Fury was a possibility, Hearn added: "A little bit yeah, we have to take care of our mandatories as well.
"WBO mandatory, IBF mandatory. The WBO haven’t ruled yet, but we have a WBO mandatory due, it could be [Usyk].
"We have an IBF mandatory due in Pulev. We’ve got maybe even a Dillian Whyte fight we just jump into in November.
"If Joshua's not on his game, he won’t beat Ruiz and then we’re rematching Ruiz!"
