LAS VEGAS — Floyd Mayweather Jr. used his speed and accuracy to win a unanimous decision Saturday night over Miguel Cotto in one of his toughest fights ever.

Mayweather dominated late, rocking Cotto in the 12th round to pull out a win and remain unbeaten in 43 fights. But it wasn’t easy, with Mayweather getting his nose bloodied and Cotto fighting until the final bell.

Mayweather won Cotto’s 154-pound title in the fight, which two judges scored 117-111 and the third 118-110.

Mayweather Jr. will make a minimum $32 million for his fight with Cotto at the MGM Grand Garden. It is the largest guarantee payday for a boxer in history Mayweather could walk away with $50 million.