Oleksandr Usyk has requested an extension on the negotiations for his mandatory fight with Joseph Parker, according to the Kiwi's promoter, Frank Warren.

On July 27, the WBO ordered Usyk to defend his undisputed heavyweight crown against the major sanctioning body's interim champion, Parker.

Both sides have been given 30 days to agree on terms before the bout goes to a purse bid.

However, Parker's manager, David Higgins, recently disclosed that there had been no engagement from Team Usyk.

The worrying update sparked speculation that Usyk would look to go another route.

But Warren insists Usyk has now touched base with the relevant parties.

"He (Usyk) put a letter in yesterday stating that he's asked him for an extension period, because he's injured, before being ordered to do anyth

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