Eddie Hearn, who promotes IBF, IBO, WBA heavyweight champion Anthony Joshua (20-0, 20 KOs), believes his fighter could do some real damage to WBC champion Deontay Wilder (40-0, 39 KOs).

Joshua is first scheduled to fight WBO world champion Joseph Parker in a unification on March 31 at Principality Stadium in Cardiff, Wales.

Last Saturday night at the Barclays Center in Brooklyn, Wilder (40-0, 39 KOs) recovered from near disaster after getting bad in the seventh round - to score a knockout victory over undefeated puncher Luis Ortiz in the tenth.

Hearn was impressed with Wilder's performance - because he appeared to be close to getting knocked out in the seventh - and came back to win in very dramatic fashion.

But Hearn believes Ortiz, at 38-year-old, was too old finish Wilder off.

Of course the same arguments were made when a 41-year-old Wladimir Klitschko had dropped and badly hurt Joshua in their April 2017 mega-bout, but couldn't finish him off. 

"Now we know [Wilder] has a big heart. The seventh round was incredible," Hearn said to the Los Angeles Times. "A younger, fresher man would've cleaned Wilder out quite convincingly, and if you gave Anthony Joshua those chances, it'd be frightening what would happen. … If Joshua hurts Wilder like Ortiz did … Mate, this is not going to be pretty to watch.

"[Wilder] did a lot for his career Saturday night, a lot for his profile and a lot for the Anthony Joshua fight. … The Wilder fight is the one, the biggest in the world."

While Hearn views Wilder as a dangerous opponent, because of his rocket right hand - he says the big heavyweight will not a difficult fight for Joshua.

In a recent interview, Hearn revealed that Joshua feels Parker is a more difficult fight than Wilder.

"Wilder has the equalizer [of power], which we saw," Hearn said. "It's a dangerous fight, but technically, I don't think it's that difficult of a fight. Anthony didn't watch that fight and say, 'Oh, I see weaknesses,' everybody has already seen the weaknesses. Look at the shots Wilder took.

"The difference is you're not talking about an old man in Anthony Joshua. You're talking about someone that when you're hurt, he's going to pounce on you and you're going to get hit by 20 shots you don't even see coming and it will be over. But it's a brilliant fight, a fight you might have to watch through your fingers. Because Joshua is completely fearless, more fearless than Wilder, who has that element in him as well."