Rahman named a factor that may prevent Beterbiev from beating Bivol

"In the amateurs, Beterbiev beat even heavyweight fighters early. In the flyweight division, no one has come to a decision with him. He destroys everyone. There is only one thing that can hinder Beterbiev - age. Time is not on his side. That fact aside, nobody in the top 10 is going to beat this guy," Rahman told YouTube channel FightHype.com.