The double handed volley...
Have you ever played, no, watched a doubles match? It's very different. Anyway, Nadal can't volley, so... no doubles for him.
I actually never played a tennis match, period. As I said above (and kinda hope it would spare me the ridicule, actually), I'm a new fan of the sport, just started following for a year+ or so, and by being a fan I mean WATCHING the sport, not playing it. I'd seriously suck.
I did watch several double matches, though I admit not many, because they don't usually air them here, and I understand it's different, that's why I *asked*.