Manny Pacquiao (R) of the Philippines hangs his head as his trainer Freddie Roach looks on during a post-fight news conference after losing to Floyd Mayweather Jr. of the U.S. at the MGM Grand Arena in Las Vegas, Nevada May 2, 2015. Mayweather took Pacquiao's WBO title with a unanimous decision. REUTERS/Richard Brian TPX IMAGES OF THE DAY