The WBO first ordered Usyk to face Parker in March, but Usyk, who held the WBO, WBA and WBC titles at the time, was able to go ahead with his bout with IBF champion Daniel Dubois to crown an undisputed champion. Usyk crushed Dubois on July 19, scoring a fifth-round knockout.

Usyk regained undisputed status at heavyweight by beating Dubois again, and has now been ordered to face his WBO mandatory challenger

Oleksandr Usyk (24-0, 15 KOs), fresh off his historic fifth round TKO win over Daniel Dubois at Wembley Stadium on July 19, has been instructed by the World Boxing Organization to negotiate a defense of his WBO title.