Oleksandr Oleksandrovych Usyk (; OO-seek; Ukrainian: Олекса́ндр Олекса́ндрович У́сик; born 17 January 1987) is a Ukrainian professional boxer. He reigned as the undisputed cruiserweight champion from 2018 to March 2019, being the first boxer in history to hold all four major world championships—the WBA (Super), WBC, IBF and WBO titles—at...
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