Floyd Mayweather Jr returned to the ring for the first time in 21 months with a unanimous points victory over Juan Manuel Marquez in Las Vegas.

Mayweather, who announced his retirement after beating Ricky Hatton in 2007, dominated his five-time, three-weight world champion opponent.

The American knocked down Marquez in the second round, then peppered him with damaging shots to remain unbeaten.

Floyd Mayweather Jr defeat Marquez by Unanimous decision. His career record was 40-0.