Manny Pacquiao doubts he will have a rematch with Floyd Mayweather because the American says he's retiring.<br />Mayweather beat Pacquiao in boxing's richest fight in May, and after he defeated Andre Berto last week for the 49th win of his undefeated career, he said he will retire.<br />"Boxing is not my focus because I can only fight next year, to give my shoulder a rest," Pacquiao told The Associated Press on Wednesday.<br />Pacquiao also said he was waiting to see if U.S. boxing authorities will sanction Mayweather for taking an IV drip after the weigh-in for their fight in Las Vegas.<br />Pacquiao's camp was critical of anti-doping authorities who did not allow him to take medication for his rotator cuff injury before the fight.
