MOSCOW, April 8 American mixed martial arts fighter Aljamain Sterling suspected Petr Yan of the use of illegal drugs. In an interview with Championship, the American suggested that the Russian UFC fighter could take doping. «Why don't we still see news that Jan passed a positive test? «But USADA never caught TJ, he was caught by the New York State Athletic Commission. I have my beliefs. Maybe he's clean, maybe he's not. He withdrew from the first fight for personal reasons — I don't know what that means No one else is withdrawing from fights with this wording,» Sterling said.