WBC heavyweight world champion Deontay Wilder (40-0, 39 KOs) is pushing hard for a heavyweight unification bout with IBF, IBO, WBA champion Anthony Joshua (20-0, 20 KOs).

Wilder will be ringside on March 31, when Joshua collides with WBO world champion Joseph Parker (24-0, 18 KOs) at Principality Stadium in Cardiff, Wales.

This past Saturday night at the Barclays Center in Brooklyn, Wilder overcame near disaster in the seventh round of his seventh world title defense, as he stopped undefeated Cuban challenger Luis Ortiz in the tenth round.

After dropping Ortiz in the fifth, Wilder was badly hurt in the seventh round and appeared to be on the verge of getting stopped.

Wilder managed to recover, fought back, and dropped Ortiz two more time for a knockout win in the tenth.

"I want to unify. I am ready whenever those guys are," said Wilder. "I figured out a way to come back. A true champion always finds a way. That's what I did."

Joshua's promoter, Eddie Hearn, has no problem making that fight in 2018 - if Parker overcomes his next assignment at the end of this month.

The fight may or may not be next for Joshua, as Hearn would like to bring his man back in the summer for what might be his United States debut.

Whether he's next or not, Hearn realizes that a Wilder-Joshua contest is quickly becoming the biggest boxing event in the world.

"It's the biggest fight in world boxing," Hearn told Sportsweek on BBC Radio 5 live.

"He has the biggest test of his career against Parker but if he wins it Anthony wants to fight Wilder. He thinks he can beat him and Wilder is beatable, but Wilder is also very dangerous.

"Both Wilder and Joshua are electric to watch, both punch very hard and both have shown signs of vulnerability. You have to give the fans what they want, otherwise over time they lose interest. I think it will happen 2018. I don't think there is any holding AJ back."