Secrets, acting & 16 years unbeaten - in camp with Usyk

Dutchman Verhoeven, 37, boasts an impressive kickboxing resume, reigning as Glory's heavyweight champion for 11 years and making 13 successful defences, but has boxed just once professionally - in 2014.

But Usyk's CV in boxing is just as eye-catching - if not more so.

After winning gold at the 2012 Olympics, the Ukrainian has established himself as one of the pound-for-pound greats by achieving undisputed status at cruiserweight and, twice, at heavyweight.

Usyk, 39, has brushed aside Anthony Joshua, Tyson Fury and Daniel Dubois - beating each of the Britons on two occasions - and, despite Verhoeven's lack of boxing experience, is approaching this bout with the same mentality.

"The opponent might be different but my preparations are not different," Usyk said.

"I work hard, I do a lot of work in sparring, conditioning and cardio.

"I train like I'm fighting Tyson Fury or Daniel Dubois, because for me it's a serious fight. It's not fake. For me it's not a show, it's a fight."