I think Calzaghe is underrated in Britain partly because he is Welsh, and underrated in other parts because they see him as British. I think Hatton should be higher than Joe in the p4p list even now, but that is down to bias as well. Bias apart - neither can be the number one. Mayweather has to be there, and I can't see a conclusive argument against that. If Hatton beats him (please god) then he would have to be number one (second top 3 p4p he would have beaten).