Tyson Fury has set a one-week deadline for "suitors" to "come up with the money" to fight him.

Fury claimed before and after retaining his WBC world heavyweight title by stopping Dillian Whyte at Wembley in April that the all-British fight would be the last of his career.

Yet talked has turned to a unification bout between the 34-year-old and WBA, IBF and WBO champion Oleksandr Usyk following the Ukrainian's second victory over Anthony Joshua on Saturday.

Usyk's promoter Alex Krassyuk said a fight with Fury is "in the making", while Fury's co-promoters Frank Warren and Bob Arum are also confident of doing a deal.

Fury on Wednesday urged the interested parties to put their money where their mouth is.

He posted on Instagram and Twitter: "Hi guys, for all these suitors out there that want to make the fight, I’m gonna give you all seven days, until the first of September, to come up with the money. If not, thank you vey much, it's been a blast, I'm retired."

Fury added in another video: "And also guys, forgot to say, all of them offers submitted, must be to my lawyer Robert Davies, in writing, with proof of funds. So let the games begin. Boom!"

WBC president Mauricio Sulaiman this week said Fury has until Friday to make it clear whether he intends to fight again.

Fury stated in June that he would want £500million to come out of retirement.