Oleksandr Usyk's choice to vacate his championship titles explained - so he can decide ‘final chapter’ for himself

Oleksandr Usyk has vacated his heavyweight world championship titles, with his promoter explaining that he wants to control the final chapter of his career rather than being dictated to by mandatory title defences. The WBC has already responded by naming Agit Kabayel, who held the WBC interim title, as its new heavyweight champion. The IBF and WBA have yet to announce their decisions regarding their newly-vacated belts.