At welter, Mayweather has not got the power to stop elite guys. ALso, If mayweather's camp know what they are doing, they will make sure Floyd doesn't engage in close, banging action so he wouldn't get in the postition to do this anyway. Mayweather will win a wide ud in my opinion but he will not be able to knock Hatton out. Instaed he will saty outside, jabbing Hatton consistently and then throwing flashy comb's when Hatton goes, tries to go to the body.