Joyce ready to fill Fury or Usyk void as heavyweight eyes title shot
Fury, the WBC title-holder, and Usyk, who possesses the WBO, WBA (Super) and IBF crowns, have been seeking to agree terms for a fight on April 29.
Negotiations have stalled on multiple occasions however, while the pair have sparred verbally throughout, though it appears Fury will now take a 70-30 purse split.
WBO interim heavyweight champion Joyce, who is arguably the strongest mandatory challenger to either man, would be happy to square off if a deal falls through, though he would prefer to face an ultimate winner.
"It's [been] kind of dragging on a bit," he told Sky Sports' Toe2Toe podcast. "Fury's got 70 per cent [so] I guess it's happening now.
"He's started camp, [and] I would imagine Usyk's already in camp. Maybe he knows something we don't. Possibly, [I could fight one of them]. I guess it's a good back-up plan."
Reiterating he would prefer to wait though, the Briton added: "That would be something, wouldn't it? There's been a lot of rematch clauses of late. They drag on, don't they?
"It's quite refreshing to hear that there isn't one for this fight. I can jump in afterwards [and] fight the winner. I'm confident in my abilities and I think it would be a great fight against either of them."
On a preferred opponent, Joyce admitted an all-British clash thrilled him, adding: "I really like the sound of the Fury fight. Can you imagine? Undisputed has a nice ring to it."