Floyd Mayweather earned a unanimous decision over Andre Berto on Saturday to claim his 49th victory in an impressive unbeaten ring career spanning two decades. All three judges ruled in Mayweather’s favour and afterwards the American welterweight world champion confirmed that he was retiring. “My career is over,” he said. “It’s official.” He equals the perfect 49-0 record of heavyweight legend Rocky Marciano and retains his WBA and WBC titles, embellishing his reputation as the best boxer of his generation. The 38-year-old self-styled “TBE” (”The Best Ever”), who has consistently said that the Berto showdown would be the last time he steps into the ring, had too much guile and nous for the rank outsider. Berto, who has now lost four of his last seven fights, was set up as the fall guy for the pound-for-pound king’s coronation – and he played the role perfectly, showing plenty of heart with little quality. Mayweather has his critics, but he was given a hero’s welcome at the MGM Grand Garden Arena in Las Vegas by a boisterous crowd who had come expecting to see him give Berto, 32, an old-fashioned beating.