Bryant Jennings has offered to take on Anthony Joshua if the WBA ruling forces Wladimir Klitschko out of contention for the fight.
Joshua was set to fight Klitschko on December 10 in Manchester, but has been forced to wait while the WBA make their decision whether their vacant title will be at stake.
If the fight does fall through, the Ukranian is expected to seek an alternate clash with Lucas Browne in Hamburg.
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Jennings, who was beaten on points by Klistchko last year, is reportedly willing to challenge Joshua for his IBF title on the scheduled date.
The American boxer stated: "I will fight Anthony Joshua sometime in the future period.
"Upon whatever circumstances we fall upon, December 10? That's possible. I'm going to say that's possible."
Several heavyweights are expected to feature in Manchester, as previously suggested by Joshua's promoter Eddie Hearn.
Jennings is eager to make his UK debut and would gladly fight anyone, even if it's not the British boxer.
He added: "I've been interested in that since 2012-2013. I've never had the opportunity to do so.
"I understand they have a great fan base over there - a lot of loyal, dedicated boxing fans - and I just think I have a whole lot more to offer.
"I think I can be appreciated a whole lot more from an overseas fan point of view, rather than America. In America, pretty much they have got their eyes set on who they want to push and things like that.
"Any activity would interest me. Top guys like to fight top guys. Of course that's of interest."
The WBA is expected to give their verdict very soon, with Browne claiming on social media that he expects to learn the news in the "next few hours".
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