Anthony Joshua's promoter Eddie Hearn has slammed Deontay Wilder for "wasting his time" during negotiations for a unifying world title fight.
Hearn accused WBC world heavyweight champion Wilder of using Joshua's name to build his own profile in an interview with IFL TV on Saturday.
He also said he does not believe Wilder wants the fight to happen with discussions over the financial split for the bout seemingly at a dead end.
"I'm sick and tired of idiots out there who thinks he wants the fight," said Hearn. "How stupid do you have to be to think Deontay Wilder wants this fight?"
"You could walk up any high street, any town in the world and ask who Deontay Wilder is and no one has a f****** clue who he is."
Wilder defends his title against Tyson Fury at the Staples Centre in Los Angeles on Dec. 1 but a bout with Anthony Joshua looks to be moving further away after Hearn's comments.
British fighter Joshua knocked out Alexander Povetkin at Wembley Stadium in September to retain the IBF, WBA and WBO titles and is booked to fight at the same venue once more in April.
But Wilder's claim that he deserved nothing less than a 60/40 purse split against Joshua was met with derision by Hearn, whose patience seems to be running out.
"He ain't even going to do 300,000 pay per views on Showtime [against Fury] and you want 60/40 [against Joshua]? Idiot.
"Don't waste our time. Don't use Joshua's name to gain profile and publicity. If that's what he really thinks please don't f****** waste my time.
"I'm busy, no time for time-wasters, give me someone who wants to fight Joshua, not talk about it to raise their profile."