The famous old story goes that Dubois, then a teenager completely unknown outside of boxing circles, rocked up to Anthony Joshua’s gym in 2016 and gave the Olympian a frightful few rounds, rumoured to have left the future world champion out cold.

Oleksandr Usyk will take on Daniel Dubois for the chance to become a two-time undisputed world champion - and his preparation may surprise many fans.

When Usyk rematches Dubois for boxing's undisputed heavyweight championship on Saturday, he faces a different fighter from the one he disciplined two years ago.