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.  So, it's only natural that when Usyk (23-0,

Almost two years after knocking out Daniel Dubois, Oleksandr Usyk did it again to assert his reign as undisputed heavyweight boxing champion.

Oleksandr Usyk knocked out Daniel Dubois to reign as the undisputed heavyweight boxing champion. Round-by-round analysis.