Regardless of what his corner man said.. it was pretty obvious to me at least that Hatton was stronger than Mayweather in that fight, and I can't think of many fighters who would give Mayweather an overall much harder fight than Hatton. Cotto IMO could give Mayweather a harder time, but I have a feeling his slowness of foot would cause him a whole heap of problems against Mayweather. Also I feel that Mosley isn't good enough at a distance to truly challenge Mayweather who thinks faster than him, is faster, and better technically. I think however that Paul Williams is Mayweather's biggest challenge, but that fight isn't happening.