to America to dethrone American Don Curry, then the undisputed world champion, this leading to Mayweather's decision to enter the ring to Bruce Springsteen's "Born in the U.S.A.". Shortly before the start of the match, the Hatton fans also repeatedly booed the American national anthem, drawing large criticism post-fight. The fight had 920,000 buys on HBO in the United States, and 1,150,000 buys in the United Kingdom on Sky Box Office. Fight Hatton tried to compete with Mayweather in the early rounds. In the first round Hatton caught Mayweather with a left jab which knocked Mayweather off balance. His constant pressure appeared to make Mayweather uncomfortable at first, but soon gave way. In the third round, Mayweather landed a right that cut Hatton above the right eye. In round six, referee Joe Cortez took a point away from Hatton after he threw punches at the back of Mayweathers' head when he was forced under the top rope. Hatton became angry at the referee's decision to deduct a point from him and turned his back on him in frustration, shaking his bottom at Mayweather. Hatton would later claim that he had become angry by the referee and that had caused him to lose his calm and contributed to his downfall. Hatton was able to hold his own, until round six, after Hatton got worn down from chasing Mayweather around the ring. Mayweather sensed the exhaustion of Hatton, and pursued Hatton's punches with stiff, damaging counterpunches. Mayweather was clearly in control before rocking Hatton in the 10th round. He knocked him down with a left hook, and Hatton was badly hurt. He looked disorientated when he got up, but referee Joe Cortez let the fight continue. Mayweather wasted no time jumping on him again, landing a flurry of punches, including another left hook that sent Hatton staggering backward and down again. Cortez called off the fight at 1:35 without a count at the same time the white towel was thrown from Hatton's corner. The fight received large amounts of publicity, with both fighters promoting the fight heavily. Aftermath Mayweather announced his retirement from boxing on June 6, 2008. He returned to the ring 15 months later to beat Juan Manuel Márquez by a 12-round unanimous decision. Mayweather went on to appear at World Wrestling Entertainment (WWE)'s No Way Out pay-per-view on February 17, 2008 in Las Vegas, Nevada, where he was involved