"At the time of the fight, when this medicine was legal, maybe he was taking this medicine," Cherchi said. "It improves the blood, the stamina; in fact if you see the Carlos Takam [v Povetkin] fight, what made the difference were the final rounds.
"My personal opinion, until the seventh round, the fight was very close, maybe one point for Carlos... it's strange because in the last rounds he [Povetkin] was more fresh suddenly, I don't know."
Parker's promoters Duco Events today confirmed that Parker and Takam would be subjected to a World Anti Doping Agency approved drugs test after their fight at the Vodafone Events Centre, with South Aucklander Parker saying: "Boxing has got to be drug free and that's the reason we do drug tests and we've just got to keep it clean."
Trainer Kevin Barry said: "This... Povetkin and Wilder [fight] for the WBC title [is one] which boxing fans and sporting fans around the world have been waiting for. They've been making this fight for a long time and now for it not to take place is a real disappointment.
"[But] this is fantastic news for our promotion here in New Zealand because the eyes of the boxing world will be on Joseph Parker versus Carlos Takam. This fight will take even more interest in the boxing and sporting world."
Cherchi confirmed that Takam's sparring sessions would continue to be held behind closed doors after a member of Parker's camp was suspected of spying on a session last week.