Joshua says had health issue before first Ruiz fight

Boxing - Anthony Joshua poses with the IBF, WBA, WBO & IBO World Heavyweight belts after winning his title fight against Andy Ruiz Jr - Al Faisaliah Tower, Riyadh, Saudi Arabia - December 8, 2019 Anthony Joshua poses with the belts Action Images via Reuters/Andrew Couldridge

(Reuters) - Briton Anthony Joshua, who reclaimed his world heavyweight titles with a clinical victory over Andy Ruiz Jr on Sunday, says a health issue had left him tired and drained before his shock defeat to the Mexican-American in their first fight in June.

Joshua regained the IBF, WBA, WBO and IBO titles with a unanimous points victory in Saudi Arabia, six months after he was sensationally dethroned by Ruiz at Madison Square Gardens in one of boxing's biggest upsets.