Originally Posted by DRII
Besides the other Big 4; i would say Big servers who are also competent enough off the ground ie Isner, Delpo, a healthy Fish...
Nole loves rythum, anyone who can upset his rythum has a decent chance.
Chris Fowler on ESPN proposed a similar question. Who would rather play Djoker than Federer? The best that Patrick McEnroe could come up with is a guy like you are saying, and he pointed to to Roddick as one example.