Nadal and Sampras are both great fighters. Sampras was at times willing to literally spill his guts for a tennis match however he'd strangely bow down players who had no business beating him on clay. Nadal on the other hand is always trying to win regardless of the surface. It's tough to pick between them Sampras literally being sick in order to win a match but knocks himself by being to having a weak spine at times on clay whereas Nadal consistently giving 100% on all surfaces. Who'd you pick? I voted for Nadal, edges it by a nose IMO.