TYSON FURY urged Anthony Joshua to 'get the f*** on with it' and decide whether he wants to fight Oleksandr Usyk or not.
AJ was beaten by Usyk in September but has the right to an immediate rematch.
However, it has not stopped Fury and his promotional team from attempting to pay Joshua to step aside so they can negotiate an undisputed title fight.
AJ confusingly said he has no intention of sitting on the sidelines, but is a 'businessman' and will at least consider an offer.
In response, Fury told "Listen, I'm not going to give an opinion on that because he'll end up seeing this interview and not stepping aside.
"So I want him to step aside so I can absolutely batter Oleksandr Usyk. But if he does, he does and if he doesn't, he doesn't.
"But one thing I will say is get the f*** on with it. Either take your money and f*** off or fight the man.
"Either way, one or the other."
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Fury, 33, who retained his WBC title against Deontay Wilder, 36, in October, has maintained he wants to fight the Ukrainian next.
And according to his promoter Frank Warren, negotiations have started to persuade AJ to sit out his rematch with Usyk.
Warren said: "There's been talks going on for a while now and it's all got to come to fruition, it's got to move on now.
"It seems to me there is a will to make this happen and hopefully if we can get everybody to sign an agreement, without announcing it, we can move forward.
"Until it's signed it don't mean nothing. There is a will and we all want it, everybody wants this fight between Tyson and Usyk. Everybody."
Fury could still be ordered into a mandatory title defence against Dillian Whyte, 33, who is the WBC 'interim' champion.
But Whyte's prior legal case with the WBC, to speed up his much-earned shot at the belt, has actually prevented his fight with Fury from being ordered.
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And an undisputed title fight could supersede a mandatory defence but AJ would have to wait for Whyte to then fight the winner of Fury and Usyk.
Joshua, 32, has been warned he has until Christmas to make up his mind and decide whether he will rematch Usyk, 34, or not.
Fury's US promoter Bob Arum has revealed Saudi Arabia has shown an interest in hosting an undisputed showdown with Usyk in March.