Floyd Mayweather remains the WBA and WBC welterweight boxing champion after a unanimous points victory over Marcos Maidana in Las Vegas.

It extends five-weight world champion Mayweather’s unbeaten run to 47 fights.

In just the second rematch of his 18-year career, the 37-year-old American emerged as a comfortable winner on all three judges’ scorecards. Two judges scored the 12-round contest 116-111 and the third had it 115-112 for the champion, who was a heavy favourite coming into the bout after winning their first fight by a majority decision in May.

During the eighth round, Mayweather accused Maidana of biting him on the wrist, a charge the Argentine denied.

The incident happened while the pair were in a clinch near the centre of the ring during their feisty encounter.