• Usyk vacates belt in order to pursue Tyson Fury rematch
• Dubois now expected to fight Joshua for title at Wembley

The undisputed world heavyweight champion, Oleksandr Usyk, has confirmed he will vacate his IBF title, clearing the way for Daniel Dubois and Anthony Joshua to fight for it in September.

The Ukrainian became the first heavyweight to hold the IBF, WBO, WBA and WBC belts when he beat Tyson Fury in Saudi Arabia last month – but has been forced to relinquish one of the belts just five weeks after becoming undisputed champion.