On the topic
Rafael Nadal would have done good on any era in clay. I really find it hard to believe that a player can be better than him on CLAY.
He is too good to be true. In my opinion, there never was a player better than Nadal on clay and I don't think there ever will be a player greater than Nadal on clay
There is an artist in Roger Federer who expresses himself best at the Tennis court