The speculation surrounding McCracken's future in the AJ camp was then heightened when the two-time world heavyweight champion was pictured in various gyms across America.

One of the gyms which he visited was in Texas and belonged to Ronnie Shields, the former trainer of Mike Tyson and Evander Holyfield, and his assistant Dominick Guinn.

Speaking to MyBettingSites, Guinn believes Joshua needs to make a change if he has any chance of beating Usyk in a rematch.

“It was a great visit," said Guinn. "I always thought Anthony Joshua was a great guy out of the ring. We worked with him on a few things and just gave him some advice that was pretty much it.

"There's always a time and a place for change. I don't know his team. But if I was in his shoes, I would definitely make a change."

Guinn also made a case for why himself and Shields would be a perfect fighter-trainer combination for Joshua.

"He needs to get back into believing in himself, believing what he can do. I believe that he knows that he’s a champion, he knows what to do. I think he just really needs somebody to bring him out of him. And I think right now, the people over there, his current team are probably not bringing it out of him," Guinn said.

"We’ll bring the dog out of him, the killer out of him, help him remember how it felt before he won his first title, before he beat Charles Martin and got that first belt. And the hunger he felt when he first won it.

"If he comes to us, that's what we’ll be preaching for him to get back to. I think it's just like a light switch. We just need to turn the lights on. It's going to be just pretty much dead easy to just turn a light on. If he decides to come to Houston, he will win that title back and WBC belt also."

If Joshua does indeed decide to change the make-up of his camp for the second fight against Usyk, but wants to keep McCracken, Guinn is willing to form a partnership with the 53-year-old.

"If it was up to me, I wouldn't have a problem with working with Rob McCracken, because especially if you've been with somebody for so long, it's kind of hard to just turn your back on them. 

"So I could understand being able to go back to his current coach and asking: ‘What do you think of this, or what do you think of that?’ So I understand that, as this person has been with him from day one. I can't speak for Ronnie, but Ronnie's a great guy, a great coach. I don't think it would be a problem."

Watch The DAZN Boxing Show discuss Anthony Joshua's search for a new trainer below.