Eddie Hearn says there is "no chance" a contract for an all-British heavyweight title fight between Anthony Joshua and Tyson Fury will be signed by Monday.
WBC champion Fury on Saturday warned Joshua he will "move on to fight someone else" if Joshua does not agree terms that have been offered at the start of next week.
December 3 has been pencilled in as a date for the English duo to do battle in what would be a mouth-watering and long-awaited bout.
Hearn, Joshua's promoter, says Fury must be patient as there is no way a deal will be struck so quickly.
He said on the Seconds Out YouTube channel: "There is no chance this fight will get signed by Monday. There is no need for this fight to get signed by Monday.
"If he doesn't [want to fight Joshua], and I guess he doesn't, then he'll do what he'll do and the fans might even fall for it."
Hearn this week stated the first offer from the Fury camp was not acceptable, but "positive conversations" had taken place between the two parties.
He revealed Fury will be fighting Joshua if he is realistic with his deadline.
"We have a meeting on Monday, with DAZN, with BT, with everybody, but it's going to take time," added Hearn. "If he wants to put a time frame on it of Monday then it’s clear to the whole public he doesn't want the fight.
"It's not going to get signed on Monday so if he's walking away on Monday the fight's off."