Donaire demos why Mayweather will have a hard time with Ortiz and Pacquiao's southpaw stance

- Donaire hows why Pacquiao's southpaw stance poses an added problem for Mayweather. Ortiz is a southpaw too, which is why Donaire thinks Mayweather chose to fight him, in preparation for Manny. - ignore - Manny Pacquiao Floyd Mayweather Jr. Boxing Wladimir Witali Klitschko Amir Khan Zab Judah Philippines Bob Arum Top Rank Golden Boy Oscar Dela Hoya Victor Ortiz Elie Seckbach Twitter Facebook Video Sergio Martinez Brandon Rios Pound for Pound Best Fighter Roy Jones Jr.