Frank Warren, the co-promoter for WBC heavyweight champion Tyson Fury, is still standing firm that he could easily see Oleksandr Usyk pulling off the upset when he faces Anthony Joshua.

On Saturday night at Tottenham Hotspur Stadium, Joshua will defend the WBO, IBF, WBA, IBO heavyweight titles against Usyk.

In 2018, Usyk became the undisputed cruiserweight champion when he cleaned out the entire division by claiming a dominant win over Murat Gassiav in the final bout of the World Boxing Super Series tournament.

If the contest goes the distance, Warren would back him to win a decision.

"He proved it at cruiserweight. He was fantastic, and he’s made his mark in that weight division. He was a superb cruiserweight. He’s done everything you could ask for. He’s come up a weight and fought Chazz Witherspoon, went seven rounds, and he fought Derek Chisora," Warren told IFL TV.

"So now that he’s [Usyk] is up there and comfortable, I don’t think he’s a natural heavyweight. I bet you if he still needed to, he could probably still make cruiserweight. Who knows? But Anthony Joshua must be the favorite for the fight. He’s the bigger guy, much bigger, and he’s a bigger puncher.

“Having said that, if he [Joshua] doesn’t get rid of him, and if he’s still there after five or six rounds, then it gets to the end of the fight, if that goes 12 rounds, I would fancy Usyk to get the decision because to get there, he’s going to have to outbox him."

Joshua is the bigger and stronger man in the contest.

Warren expects Usyk to use his boxing skills, speed and rapid movements to neutralize Joshua's power punching. 

“He’s [Usyk] obviously a very smart operator, and you know how he’s going to fight. He’s going to get inside, get underneath AJ’s jab, and if he can do that and work inside, he can give him a lot of problems. We don’t know because we want the big fight," Warren said.