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LAS VEGAS, NV - MAY 02: (EDITORS NOTE: Image has been converted to black and white.) Floyd Mayweather Jr. looks down before taking on Manny Pacquiao in their welterweight unification championship bout on May 2, 2015 at MGM Grand Garden Arena in Las Vegas, Nevada. (Photo by Al Bello/Getty Images)

LAS VEGAS, NV - MAY 02:  (EDITORS NOTE: Image has been converted to black and white.) Floyd Mayweather Jr. looks down before taking on Manny Pacquiao in their welterweight unification championship bout on May 2, 2015 at MGM Grand Garden Arena in Las Vegas, Nevada.  (Photo by Al Bello/Getty Images)