Undefeated Artur Beterbiev defended three world light-heavyweight boxing titles and stopped Callum Smith in the seventh round, winning by knockout. Taking him to 20 wins, with 20 knockouts - an impressive statistic! Artur Beterbiev is a 38-year-old Russian-born Canadian and he stopped the Liverpool man, Smith, after two minutes of the seventh round in Quebec City, Canada. Beterbiev is the the only world champion to win every fight by early stoppage and he moves to 20-0.