Usyk won the rematch with a 12-round split decision on Saturday night, at the Jeddah Superdome arena in Saudi Arabia.
In September of last year, Usyk won a boxing fight against Joshua at the Tottenham Hotspur Stadium in London, by unanimous decision.
The 35-year-old Ukrainian has 20 wins (13 by knockout) in the professional ring. Joshua, 32, has won 24 fights (22 by knockout) and suffered three losses.