He did just that and turned things around then stopped Dubois in the 9th round. That left many questioning Dubois’s heart, but he has since beaten Jarrell Miller, Filip Hrgovic and Anthony Joshua to establish himself as a legitimate IBF world champion.

"It’s gonna be a bloodbath. I’m going to put all the controversy and nonsense to rest," Dubois said at Tuesday's news conference.

In their first bout, Dubois and Usyk exchanged knockdowns, in Warren's mind, yet Usyk's time on the canvas was adjudged to have been caused by a low blow rather than a legitimate shot. Warren summarized Usyk's weakness in three words, when Sky Sports asked him.