Even though Dubois has now knocked out Anthony Joshua and reigns as IBF heavyweight world champion, Charles still holds plenty of bitterness over the title challenge against the Ukrainian a year ago.

The fight was controversial as Dubois floored Usyk with a punch that was ruled a low blow by the referee. The champion was then given several minutes to recover, allowing him to come back and stop his challenger later in the bout.

Ultimately the decision was upheld and no rematch was granted despite promoter Frank Warren’s appeal.

Now though, a second fight could be on the table if Usyk beats Fury in their rematch. During an interview Dubois’ trainer Charles did on talkSPORT Fight Night on Saturday night, he addressed this possibility

“Everything was stacked up against us, we knew about it, we knew about everything,” he said of the first fight.

“This is actually personal.

“I shouldn’t make it personal, it’s always about the fighters, and it’s still about the fighters.

“I don’t get in the ring to take punches or give punches.

“Mr Usyk is fake. Exceptional boxer, masterful boxer, a genius of what he’s done and what he can do.

“But he’s a fake and he’s a liar and a cheat.”

Asked to explain his remarks, Charles continued: “It’s well documented. He is a guy who says he’s a God fearing man, he’s always crossing himself.

“This is going out to Usyk – if you believe in the same God that I and the world population do, what we refer to as God, one of the ten commandments is you cannot cheat. That’s against one of the ten commandments.

“Make your mind up, do you worship God or not? Because if you do, the cheating and the acting he did when Daniel dropped him, he should win an Oscar for that acting.”

Regarding whether he thinks Usyk attempted to get Dubois disqualified, Charles responded: “Disqualified? I don’t think disqualification was in his mind.

“The man was gone, he was gone. I know what I saw live. I didn’t need no replays, I know what I saw live.

“The man was able to act and cheat his way back. I’ve said in many, many, many interviews. No [it was not a low blow], hell no.”

Concluding the conversation, Charles welcomed a potential rematch: “Yeah, if that presents itself. Our focus is not on that. No, it’s not.

“Our focus is not on meeting Oleksandr Usyk. But should that materialize, I dare him, Usyk, to get in the ring with  Daniel Dubois .”