Mikaela Mayer outpointed Mary Spencer in Canada to become a unified light-middleweight and a three-division world champion. The 35-year-old American produced a dominant performance at the Montreal Casino, outboxing the hometown favourite over 10 rounds. Judges scored the contest 100-90, 98-92 and 98-92 as Mayer claimed the WBA crown and the vacant WBC and WBO […]