Oleksandr Usyk, with his characteristic pragmatism, shut down any questions over whether he can motivate himself to keep going after a knockout win over Daniel Dubois on Saturday helped him reclaim the undisputed heavyweight boxing crown.

BBC Sport looks at where Oleksandr Usyk ranks among the all-time heavyweight greats and who in the current generation could beat him.

An undisputed heavyweight champion will be crowned on Saturday when Oleksandr Usyk battles Daniel Dubois. Usyk currently holds the WBC, WBA and WBO titles, while Dubois is the IBF champion. The two are set to slug it out at Wembley Stadium in London ( DAZN PPV, 12:30 p.m. ET -- buy now ).