The World Boxing Association (WBA) officially sanctioned the fight between WBA, WBO, IBO and IBF heavyweight champion Oleksandr Usyk (20-0, 13 KOs) with British challenger Daniel Dubois (19-1, 18 KOs).

The organization announced this on Twitter..

Boxing teams will have a 30-day negotiation period from April 4 to May 2. If the contract is not signed, then promotional auctions will take place.

We will remind, earlier Usyk’s negotiations with the WBC champion Tyson Fury failed. Now the Ukrainian must defend his titles against mandatory challengers.

Dubois holds the WBA World belt and is the mandatory challenger for the organization's world title held by Usyk..

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Earlier it was reported that Anthony Joshua won the first fight after two losses to Usyk.