LAS VEGAS - Marcos Maidana said he was "robbed" in losing to Floyd Mayweather Jr. by a majority decision in a welterweight world championship unification fight early Sunday morning.

It looks as if both fighters will be returning to the scene of the crime in a few months. Mayweather escaped to fight another night, and the fight may be against the man who came closest to handing him the first defeat of his 16-year pro career.

Maidana nearly did what 45 other fighters couldn't, taking the fight to Mayweather before losing a 12-round majority decision that angered both the Argentine and the fans at MGM Grand arena.

Mayweather was hit more than any bout in his career, and needed to rally from the middle rounds on to keep his unbeaten record. Maidana called the richest fighter in the world an ordinary boxer and said he deserved a rematch in September.

"If the fans want to see us do it again, we'll do it," Mayweather said.

Maidana threw twice as many punches, but Mayweather was more efficient in landing more than half his shots. Mayweather won five of the last seven rounds on two scorecards and six of the last seven on the third to pull out the win.

Bleeding from a cut by his right eye from a head butt in the fourth round that he said blinded him for two rounds, Mayweather had to reach deep into his bag of tricks to salvage what had been expected to be a relatively easy $32 million payday against the 6-1 underdog.

The decision was met with disbelief by Maidana and booed heavily by the crowd. Mayweather won by 117-111 on one scorecard and 116-112 on another. A third judge had it even at 114-114.