RIYADH, Saudi Arabia: Dmitry Bivol dethroned Artur Beterbiev as undisputed light-heavyweight champion in a thrilling contest in Riyadh in the early hours of Sunday. Four months after their first classic encounter, 34-year-old Bivol won a majority points decision against his Russian compatriot, six years his senior. It was Beterbiev’s first defeat in 22 pro fights but Bivol was a worthy winner after two judges gave him the decision by 116-112 and 115-113 with the third seeing it as a 114-114 draw. “I didn’t have as much pressure like last time. I just wanted to work from the first round until the end of the 12th.