How to destroy an opponent's rhythm.

[GeoffWilliams]

Youzhny, Nadal, Wawrinka, and Joker, Simon, etc. all do this: hit two or three normal shots, or move to the slice shot for a couple in a row, and then hit a shot that changes radically after the bounce, such as a super topspin shot, a flat shot, a drop shot, a kicker, etc.

[GeoffWilliams]

What can you get out of the game? What do you intend to get out of it? Those are usually different answers (from honest folks).