Obviously Federer. Hell I got a better 2nd serve than Murray. Im sure many others just on this board do as well. Its pathetic. Murray is one way or the highway.. Push Push Push return return until his opponent makes a mistake
to be fair, he CAN play proper tennis, even if he rarely chooses to do so. his match against Nadal was a decent example. he was pushing his first serve at 140 km/h against Isner because he felt it was enough. and it was. so, good on him.
as far as the poll, its no contest and everyone knows it.