I think Tszyu is one of the top 3 hardest punchers of all time 140 and below. Hatton used his head to block Tszyu shots, I know it sounds stupid but Kostya's right hand is all about leverage, by standing close he stopped KT getting all that leverage. If Floyd pulls back like Zab did he goes down, but i still think Mayweather wins this one 6 outta 10 times. Ricky beating Tszyu was almost a sure thing stylistically on reflection.