WBC heavyweight champion Deontay Wilder (39-0, 38 KOs) admits that he gave WBO champion Joseph Parker (24-0, 18 KOs) some solid pointers to win his upcoming unification.

But honestly speaking, Wilder is hoping that Parker's opponent - IBF, IBO, WBA champion Anthony Joshua (20-0, 20 KOs) - is the winner when the smoke clears.

Wilder is already scheduled to sit ringside for the bout, which takes place on March 31 at Principality Stadium in Cardiff, Wales.

"I'd be lying if I said I want Joseph Parker to win. But I wish Joseph Parker the best," Wilder told Newshub.

"But the reason that me and Joshua is a highly anticipated fight is that the world wants to see and it will bring the heavyweight division back to its top peak.

"But anything can happen in boxing and we all have to keep in mind that the head isn't meant to be hit in the first place, so if you get hit in a certain way you can go. This is a brutal sport."

As far as what Wilder advised Parker to do.

"Parker will also have to be mobile which I think he will do a pretty good job of. The things I'm telling you now I've told him before, because we talk," said Wilder.

"He is going to have to continue to punch while he moves and keep his head moving. If he can do that, he will see openings and see some of the weakness Joshua has."

And just because Joshua looked shredded in his recent workout photos - does not mean he's going to win, says Wilder. He feels Parker can stand to lose a few pounds, but not too much.

"Just because a person looks more muscular and looks like they have it all down pat doesn’t mean they are going to destroy everybody," Wilder said.

"I tell people that I would rather be the part then look the part, looking the part isn’t going to get me nowhere. I've seen many people look the part but when it's time to perform in a place where it really matters, they can't pull the trigger.

"I think Parker is good at where he is to be a little bit slender, not having too much muscle because when you start bulling too much muscle mass your flexibility starts to decrease."