(British Open 2012, first round, Amr Shabana vs. Tarek Momen 3:2)
In Egypt one of the standard drills at training is to feed each other with weak serves (serves that either don't tend high towards the sidewall or are not hit straight to the body of the receiver). You have to put the ball each time into the nick at this drill. Yesterday we had Ramy Ashour showing an example from the forehand side, now it's Tarek Momen showing a soft version from the backhand.
This drill has two purposes. 1) you train hitting the nick from different heights 2) you learn and memorize which are those bad serves that really allow to go for this shot.
The serve is the only moment in a rally where you can allow yourself to stand almost still. Hence you can go for your shots with a near-perfect static balance. Going for the nick requires the highest level of precision, and standing still favors your chances to be precise.
