Tony Bellew makes round prediction for Joshua vs Usyk showdown
Usyk "comes with an amazing skillset, but I just think weight divisions exist in boxing for a reason".
AJ posted a picture of himself in training this week on his Instagram account with the caption "Heavy hitta".
The former WBC cruiserweight champion has reiterated that Joshua faces a fighter who is more than capable of causing an upset.
Rounds seven, eight and nine key
"This will be the best boxer Anthony Joshua will ever face in his career," Bellew told talkSPORT.
"He is not a true heavyweight. Everyone keeps going on, yes he is a cruiserweight, but he is the greatest cruiserweight who has ever put on gloves. So he does come with an amazing skillset, but I just think weight divisions exist in boxing for a reason."
Bellew thinks that Joshua's endurance and experience at heavyweight will lead him to victory.
AJ Sparring with McKean
Joshua (24-1) has brought in Australian heavyweight Demsey McKean for some sparring ahead of his fight with the unbeaten Usyk.
"I'm up in Sheffield for the next two weeks, joining AJ's training camp," he told Sky Sports earlier this week.