IBF, WBO, IBO, WBA heavyweight champion Anthony Joshua (21-0, 20 KOs) admits that he's looking past his mandatory challenger Alexander Povetkin.

Joshua is facing Povetkin on September 22nd at Wembley in London.

But Joshua has one eye fixated on a potential unification showdown with WBC champion Deontay Wilder (40-0, 39 KOs).

Joshua already has a return date scheduled for April 13th, also at Wembley, and the opponent of choice is Wilder.

There is a deal on table for Wilder, with a guarantee of $15 million for Joshua to accept.

Joshua will be very upset if the contest with Wilder falls out for April. 

"Me and Wilder is the best fight in the division right now, not me and Povetkin," Joshua said to ESPN UK. "The deal to fight Wilder is still on the table, if it was written off I'd be very annoyed.

"We were working on the fight before I beat Carlos Takam, then it was Joseph Parker and it still hasn't happened... and now it's Povetkin. But I want the big one, I am looking past Povetkin now. I want the big guns. I am going to walk through Povetkin and for Wilder the date and location is here.'

Joshua is concerned that Wilder's career will end before the showdown comes about.

Wilder turned pro in late 2008 - making it a 10 year career in a few months. Joshua became a pro in 2013.

"For the past seven months I have found out what he wants in a contract, what he doesn't want in a contract. He's had 40 training camps, and even if you knock each opponent in a round you have still gone through hundreds of rounds in your camps, miles and miles on the clock with all the running and with the body wear and tear -- he's been a professional since 2009," Joshua said.

"That makes it a 10-year professional career, that is a long time, he's been hurt by a lot of fighters on the way, all the sparring. So what does that make? Two maybe three years left?"

Wilder is willing to do the fight - under a 50-50 split.

But Joshua says, that if Wilder believes he can win - then he should sign the contract and win the fight to secure a far more lucrative rematch.

"I'll say to all of them, Fury too, if you think you can beat me, if I wasn't in the power position, I'd take less for fights," Joshua said.

"When I fought Charles Martin for the IBF title in 2016, I took a massive reduction in payment because I was willing to back myself.

"So you have to play the game a bit -- beat me, beat me in a rematch and you are set up to be the king of the heavyweight division. If you believe it, then sign the contract and fight me."