Watch: Floyd Mayweather v Andre Berto weigh-in

In what is expected to be the final fight of his Hall of Fame career, Mayweather (48-0, 26 KOs) will put his undefeated record on the line against the all-action Berto (30-3, 23 KOs), a veteran of eight world title fights who has long been considered a potential opponent for Mayweather.

If triumphant, Mayweather would match the record of the late heavyweight champion Rocky Marciano, who retired in April 1956 with a record of 49-0.

Mayweather v Berto is live on Showtime PPV. You can order Mayweather v Berto in the UK by clicking BoxNation