Fury and Wilder get it on in Los Angeles later this year and watching on will be three-strap champion Joshua.
AJ is resting up after defending his WBA, IBF and WBO heavyweight belts against Russian Alexander Povetkin last month.
Fight fans were desperate for the Brit to fight WBC champion Wilder instead at Wembley.
And they could now have their wish, with the president of that boxing federation’ll sanction a bout between the winner of Fury vs Wilder against Joshua.
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WBC president Mauricio Sulaiman said on Sky Sports: “Absolutely, that’s a fight the world wants to see.
“That’s a fight the WBC has just ruled to support.
“During our convention, a ruling of the mandatory status included the provision of trying to make the winner of Fury-Wilder against Joshua.
“I’m not certain about any contract.
“That’s a private agreement, but the WBC is of course the one that orders the fights, so our position is that we want to see the ultimate heavyweight fight, which involves Joshua and involves the WBC champion.”