SAN JUAN, Puerto Rico — Oleksandr Usyk has been ordered by the WBO to start negotiations for a title defense against Joseph Parker amid reported talks between the Ukrainian and Daniel Dubois for a fight to become the undisputed heavyweight champion.

The World Boxing Organisation ordered Ukraine's world heavyweight champion Oleksandr Usyk to open talks with Joseph Parker on Thursday for a mandatory title defence. Previously undisputed champion Usyk,

Heavyweight champion Oleksandr Usyk has been ordered to start negotiations to defend his World Boxing Organization (WBO) heavyweight title against Joseph Parker. The order could end British fighter Daniel Dubois’s hopes of a rematch with the Ukrainian.