A unification fight between two of the heavyweights in world boxing has been asked for by supporters to determine who the best.
Joshua holds the International Boxing Federation (IBF), World Boxing Association (WBA), World Boxing Organization (WBO) and International Boxing Organization (IBO) titles while Wilder World Boxing Council (WBC) heavyweight title.
The two fighters may finally have no other choice but to take on each other as it is now been demanded by the authorities.
Joshua recently beat Alexander Povetkin in a mandatory fight for his title defense while Wilder is set to face Tyson Fury on Saturday, December 1.
A possible fight between Joshua and Wilder has been set as mandatory for the multiple title holders are the Englishman was set to face Dylan Whyte in April 2019.
WBC president Mauricio Sulaiman stated in an interview with Sky Sports that Joshua will have to face the winner of the fight between Fury and Wilder which means that a fan favourite fight is on the cards.
He said, "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."
Joshua and Wilder are both Olympic winning medallist, the British boxer has a record of 22 wins 20 from knockouts, while Wilder who recently revealed his Nigerian roots has 40 wins 39 which are from knockouts.