Heavyweight contender Dillian Whyte believes his former foe, Derek Chisora, is fully capable of pulling off a shocker in a potential fight against Oleksandr Usyk.

There is talk that Chisora and Usyk will collide in 2020 - and there is a chance that the vacant WBO world title would at stake - if the winner of Saturday's rematch, between Andy Ruiz and Anthony Joshua, decides to vacate the title instead of making a mandatory defense against Usyk.

Whyte is fighting on the undercard to the Ruiz-Joshua rematch, and faces Polish giant Mariusz Wach.

Whyte won a razor close twelve round decision in the Chisora rematch, and then came back from behind to knock Chisora out cold in the eleventh round of their rematch.

Chisora would be a huge underdog against Usyk, who unified the entire cruiserweight division and captured Olympic gold in the 2012 games.

But Whyte believes "War Chisora" can pull it off.

"Chisora does have a chance," Whyte told Sky Sports.

"Derek has actually got better as he's got older, and he's learned a lot from his losses as well. Usyk is going to think he can out-manoeuvre him, but he's very hard to fight. I think the new training that Ruben Tabares and David Haye are doing with him, he's more explosive and stronger. He seems to be getting better. He's very resilient.

"Clearly Usyk is a good fighter, a good mover and all of this, but he can't punch, and I can punch, and it was hard to keep Derek off until I landed what I needed to land. I hit him in the first round clean, he staggered back and then he just came back swinging, so I don't think Usyk carries the power to keep Derek off.

"Derek is going to try to maul him and Derek doesn't mind losing a couple of points, he doesn't mind hitting you low, and mauling and hitting the back of the head. He doesn't mind doing all of that. I don't think Usyk has fought anyone that's brought that to him."