Floyd Mayweather equalled former heavyweight great Rocky Marciano’s 49-0 record with a unanimous decision victory over Andre Berto before promptly announcing his retirement.

Floyd Mayweather made a snide dig towards former foe Manny Pacquiao on the eve of what he insists will be his final outing as a professional boxer.

Mayweather has been adamant he will not lace on the gloves again after facing Berto, despite his likely win bringing him level with Rocky Marciano’s fabled, unbeaten 49-fight unbeaten record.

Floyd Mayweather has announced he will face Andre Berto on September 12 in Las Vegas in what is likely to be the undefeated American’s final fight.