After a rocky period, two-time unified heavyweight champion Anthony Joshua has looked back to his best in recent months. 

Joshua’s physical gifts have never been in question, but over the course of five rounds of target practice against a reticent Otto Wallin and a powerful but out-of-his-depth Francis Ngannou, Joshua seems to have rediscovered the self-belief and composure that characterized his first reign as champion.

Joshua was calm, composed and cruel through the five rounds he spent dissecting Wallin but ruthless and brutal when destroying Ngannou inside two. However, Daniel Dubois’ promoter, Frank Warren, believes that Joshua will be putting himself in much more danger when he steps into the ring with the big punching – and newly determined – IBF heavyweight titleholder next month.

Oleksandr Usyk was able to stun Joshua with his timing and technique while Andy Ruiz’s fast hands famously floored Joshua four times in New York back in 2019, but Warren believes that Joshua will be taking on the heaviest puncher he has faced since he unified the heavyweight division by getting off the floor to outpoint Wladimir Klitschko more than seven years ago.

“I do. [Joshua] knows it as well – don’t worry about that,” Warren told Queensberry. “Listen, he knows him. He’s sparred with him. There’s this big debate about what happened in that sparring, and I’ve heard two versions of it. One of the reasons we signed him and I sponsored him was because of what I was being told. And that was from people who were there.”

Throughout the build up to his fight with Filip Hrgovic in June, Dubois was forced to listen to the confident Croatian recalling details of their past sparring sessions as Hrgovic attempted to bring painful memories back to the forefront of the Londoner’s mind. His plan failed and, if anything, the jibes seemed to push Dubois to new heights. He walked through a series of flush right hands and bullied the previously unbeaten Hrgovic to an eighth-round defeat.

If the rumors are to be believed, this time around it is Dubois who wields the ability to recount favorable sparring stories but he has decided to keep quiet and push the whole affair to one side.

Warren can see why Dubois is choosing not to bring up the past but he does believe that the roots of an upset are buried deep in those shared rounds.

“I understand that. That was then but how I look at it was that that was a 17-year-old kid in with a fella who was, what, 24 or 25? A gold medallist and whatever. He’s got stronger. He punches harder now. He’s matured. He seems mentally stronger. He’s a much more mentally strong guy,” Warren said.

“I saw that in Hrgovic because he talked a lot about what he done to him. It wasn’t the case actually. They didn’t spar once, they sparred four or five times and it was very tough sparring for both of them.

“Hrgovic came out and looked very good early on in the fight, catching him with those right hands. He gritted his teeth and got back into it. He busted him up and I think it was at the end of the fifth round I thought he was about to stop him. He busted him up. He showed what he was all about. And he was an underdog then. He was an underdog against [Jarrell] Miller and he was an underdog against Usyk.”