Petr Yan stunned favourite Merab Dvalishvili at UFC 323 in Las Vegas to end the Georgian's 14-fight winning streak. Petr Yan defeated Merab Dvalishvili with a dominating effort to capture the bantamweight championship by unanimous decision at UFC 323 on Saturday night. With punishing strikes and several crushing kicks to the rib cage, Yan (20-5) ended Dvalishvili's 14-match winning streak.