Let's face it: they are some of the worst clay court mugs that ever plagued this sport and nothing more than cannon fodder for Nadal.
You can't beat Nadal on clay by trying to outgrind him, that cannot be done. You have to do it the Soderling way; not necessarily play the same style as Soderling, but you need to serve, hit big, go for your shots to penetrate Nadal's defense. Only if you can do that will you have a chance.
Djokovic out_grinded Nadal all over 2011 until Federer spoiled the party.