Unbeaten American Floyd Mayweather Jr has revealed that he is expecting a "dirty and wild" fight when he meets Marcos Maidana for a second time in Las Vegas on Saturday evening.

Mayweather Jr overcame a high-energy start from Maidana in May to eventually record a majority-decision verdict, and ahead of their rematch at the MGM Grand, the pound-for-pound king has admitted that he needs to keep the Argentine under control.

The 37-year-old told reporters: "I just have to go out there and just be me and be first.

"I can't really say how the fight is going to play out, but I'm pretty sure that he's going to be, once again, extremely dirty and wild. My job is to keep everything under control the best way that I can."

Mayweather Jr will be defending his three world welterweight titles, as well as the WBC light-middleweight belt.