Gallery: Mayweather v Pacquiao

Floyd Mayweather arrives for his world welterweight championship bout against Manny Pacquiao at MGM Grand Garden Arena. Mandatory Credit: Joe Camporeale-USA TODAY Sports

Floyd Mayweather arrives for his world welterweight championship bout against Manny Pacquiao at MGM Grand Garden Arena. Mandatory Credit: Joe Camporeale-USA TODAY Sports

Manny Pacquiao of the Philippines arrives in the ring to face Floyd Mayweather Jr. of the U.S. ahead of their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines arrives in the ring with trainer Freddie Roach to face Floyd Mayweather Jr. of the U.S. ahead of their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather Jr. of the U.S. arrives in the ring to face Manny Pacquiao of the Philippines ahead of their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines arrives in the ring to face Floyd Mayweather Jr. of the U.S. ahead of their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao (Yellow/Red trunks) arrives for his welterweight championship bout against Floyd Mayweather at MGM Grand Garden Arena. Mandatory Credit: Joe Camporeale-USA TODAY Sports

Manny Pacquiao of the Philippines arrives in the ring with trainer Freddie Roach to face Floyd Mayweather Jr. of the U.S. ahead of their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather Jr. of the U.S. arrives in the ring to face Manny Pacquiao of the Philippines in their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather Jr. of the U.S. arrives in the ring to face Manny Pacquiao of the Philippines in their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather, Jr. of the U.S. (L) and Manny Pacquiao of the Philippines fight in the first round of their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines covers his face as he is punched by Floyd Mayweather, Jr. of the U.S. in the first round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather, Jr. of the U.S. and Manny Pacquiao of the Philippines fight in the first round of their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather, Jr. of the U.S. and Manny Pacquiao of the Philippines fight in the first round of their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather, Jr. of the U.S. ducks a right hand from Manny Pacquiao of the Philippines in the second round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines takes a punch from Floyd Mayweather, Jr. of the U.S. in the second round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines takes a punch from Floyd Mayweather, Jr. of the U.S. in the third round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather and Manny Pacquiao (Yellow/Red trunks) box during their world welterweight championship bout at MGM Grand Garden Arena. Mandatory Credit: Joe Camporeale-USA TODAY Sports

Manny Pacquiao of the Philippines takes Floyd Mayweather, Jr. of the U.S. into the corner in the fourth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines takes a punch from Floyd Mayweather, Jr. of the U.S. in the fourth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines takes a punch from Floyd Mayweather, Jr. of the U.S. in the fourth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas, Nevada. REUTERS/Steve Marcus

Floyd Mayweather, Jr. of the U.S. is taken into the ropes by Manny Pacquiao of the Philippines (R) in the fourth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines (R) lands a right against Floyd Mayweather, Jr. of the U.S. in the fifth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather, Jr. of the U.S. (L) and Manny Pacquiao of the Philippines fight in the fifth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines takes Floyd Mayweather, Jr. of the U.S. (L) into the ropes in the sixth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Floyd Mayweather, Jr. of the U.S. lands a right against Manny Pacquiao of the Philippines in the sixth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines (L) lands a left in the seventh round against Floyd Mayweather, Jr. of the U.S. during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines (R) and Floyd Mayweather, Jr. of the U.S. fight in the seventh round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines takes a punch from Floyd Mayweather, Jr. of the U.S. in the fourth round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus

Manny Pacquiao of the Philippines fights Floyd Mayweather, Jr. of the U.S. in the seventh round during their welterweight WBO, WBC and WBA (Super) title fight in Las Vegas. REUTERS/Steve Marcus