Undefeated five-division champion Floyd Mayweather Jr claimed a unanimous decision in a feisty encounter against Marcos Maidana to successfully defend two world titles and improve his record to 47-0 on Saturday.

In just the second rematch of his 18-year career, the 37-year-old came out on top on all three scorecards, retaining his World Boxing Association (WBA) and World Boxing Council (WBC) welterweight belts.

The victory was another masterful showcase of evasion from Mayweather, widely regarded as one of the best defensive fighters of all-time, as he danced out of danger and used his lightning counter punching to great effect.

Maidana, however, left convinced he had won the fight.

''I'm very happy to have fought twice against Floyd Mayweather, I think I did a terrific job,'' said Maidana. ''Many have fought against him and I don't think they did what I was able to do.

''I thought I did enough to win. If the judges like a fighter who runs like Floyd there is nothing I can do about it. 'He's beatable, you have to attack him. When you attack him he really doesn't know what to do. 'He is very fast on his feet I will tell you that.''