Boxing: WBO orders Joshua to defend heavyweight title against Usyk

FILE PHOTO: Boxing - Heavyweight World Title Fight - Anthony Joshua v Kubrat Pulev - The SSE Arena, London, Britain - December 12, 2020 Anthony Joshua celebrates winning his fight against Kubrat Pulev Pool via REUTERS/Andrew Couldridge

(Reuters) - The World Boxing Organization (WBO) on Saturday ordered Anthony Joshua to defend his heavyweight title against mandatory challenger Oleksandr Usyk after the Briton's bout with domestic rival Tyson Fury was thrown into doubt.

Joshua, who also holds the IBF and WBA titles, was set to face Fury - who holds the WBC belt - on Aug. 14 in Saudi Arabia. But Fury was ordered by an American arbitrator on Monday to fight Deontay Wilder for a third time before Sept. 15.