Floyd Mayweather returned to the ring for the first time in more than 20 months with a deeply impressive unanimous points victory over Juan Manuel Marquez in Las Vegas on Saturday night.

Mayweather, who announced his retirement after conquering Manchester's Ricky Hatton in December 2007, looked as if he had never been away from boxing as he gave triple world lightweight champion Marquez the runaround in this non-title welterweight fight at the MGM Grand.

The 32-year-old American (now 40-0) looked a class apart throughout from his illustrious opponent (50-5-1), who had no answers to the former P4P king after stepping up two weight divisions.

Mayweather was characteristically adept from the outset at staying out of range.

After a cagey first round which saw Marquez aim but mostly fail to land a series of left jabs and hooks, the Mexican did connect with a neat combination in the second - only to find himself on the floor within seconds, on the end of a crunching left hook.

Marquez recovered his composure from mid-round but had to contend with an elusive opponent, who continually kept him on the move yet found his target whenever he chose to get in close.

By the fourth, Marquez had the added complication of a cut above his right eye - and one useful right hand apart, still he kept missing when he went for the big shots.

It was Marquez who was using up all the energy, Mayweather's footwork and agility providing a contrasting efficiency of effort.

Mayweather's only apparent danger was complacency, and he was caught momentarily in the seventh.

But normal service was quickly resumed, Mayweather goading the Mexican as he tried but failed to get through expert defences.

From the ninth, the former five-weight champion and overwhelming favourite decided to up the tempo in search of an early finish. That did not materialise against a famously tenacious opponent - but there was never any question about Mayweather's superiority.

The scorecards underlined his dominance, with Mayweather prevailing easily by scores of 118-109, 120-107 and 119-108.