WBO, IBF, IBO, WBA heavyweight champion Anthony Joshua is not worried about Oleksandr Usyk’s performance against Tony Bellew in 2018.

Usyk, who at the time was the undisputed world champion at cruiserweight, traveled to the UK and scored a crushing knockout of Bellew, who retired in the aftermath.

That was Usyk’s final fight in the cruiserweight division before a move to the heavyweight ranks in 2019.

Last year, Usyk returned to the UK and won a tough twelve round decision over division veteran Derek Chisora.

This Saturday, Usyk will challenge Joshua for his titles at Tottenham Hotspur Stadium.

Joshua studied Usyk’s win over Bellew and felt that his countryman put in a very strong effort before the knockout finally came.

The unified champion wants to use Bellew’s misfortune as further motivation to hand Usyk the first defeat of his pro career.

“I’m quite physically conditioned and mentally conditioned so, big occasion and big pressure,” Joshua told Sky Sports Box Office at the media workout.

“Bellew was at a different stage in his career when he took the fight, and I am currently at a different stage in mine so what it means to me is probably different to what it meant to him.

“Bellew put up a great fight against him and he come up short at the end of the day which happens in boxing, but at the end of the day for me I am going to try and reverse everything that happened to Bellew and make everything work in my favor.

“For me I feel like I have nothing left if I do not get a win, so for me this is not the end of the road but the start of a new chapter.”