Just rewatched Roger Mayweather vs Kosta. Roger and Floyd have similar styles and stance. Kosta had issues with this style, how many right hands he landed on Roger? The left hook was non-existent, nothing worked for Kosta. He just outmussled Roger on the way to victory. There is no way Kosta would beat Floyd, the faster, more talented version of Roger.
Ask Sharmba Mitchell or Diaboleys Hurtado about Tszyu's left hand...or better yet rewath their fights. Particuarly the rib shots.
a pbf v tzu woulda been a big and rich event.kinda wished it happened but not to be. another good matchup woulda been dlh v tzu,but tzu lost to phillips and the dlh never eventuated