Las Vegas, May 7: Filipino boxer Manny Pacquiao has undergone surgery on his injured right shoulder. Pacquiao’s spokesman said on Wednesday that the surgery was successful and the boxer can resume boxing after recovery. It came four days after Pacquiao’s 12-round unimous decision loss to Floyd Mayweather here on Saturday in the richest fight in boxing history. But Pacquiao’s camp revealed after the fight that the Filipino had suffered a rotator cuff tear in training camp which he aggravated early in the bout. IANS