Unified heavyweight champion Oleksandr Usyk hasn't just fought (and defeated) the very best of his era, when it comes to former champions Anthony Joshua and Tyson Fury, he has done so twice.

Rival heavyweight champions set to go face-to-face on Saturday in undisputed fight Rematch after Usyk defeated Dubois by ninth round knockout in first fight, with second bout taking place at Wembley S...

"We create the optimal psychological environment for cognitive exercise," Jakub Chycki, who is Usyk's physiologist, told BBC Sport.

Dubois was routinely feinted out of position by Usyk in the first fight, forced into compromised positions. Usyk saw the patterns quickly: After Dubois would throw, he often would reset his position and stance with a subtle bounce in place, a rhythmic tell that became a green light signal for Usyk to counter.

At the Oleksandr Usyk vs. Daniel Dubois 2 weigh-ins, Oleksandr Usyk and Daniel Dubois will step on the scale Friday in London, England.