To be able to cover a tennis singles tennis court by ground and air is a physical challenge. The basic strategy comes from the geometry of the tennis court.
The geometry of the court is a rectangle. Four points to remember when hitting a cross court shot: 1.) When you hit a ball over the center of the net it has less height to attain clearance. 2.) There is more court available for landing the ball in play. 3.) The natural rotation of a balanced body is toward the cross court. 4.) You have less court to recover your position for a cross court than the down the line shot. These four factors make a “Cross Court Shot” the percentage shot! If you are running fast and arrive late to the ball a lob cross court high and deep may be needed to get back into the point. By hitting your outside cross court and deep to your opponent with any type of spin or flat you have neutralized your opponent. If you hit your cross court short you give your opponent opportunities to attack in various ways. Having the ability to hold a deep cross court rally patiently without changing the line of the ball whimsically is a “bread and butter” play that you should practice in your drill sessions. Whenever your opponent goes up the line on your deep cross court shot you can now make a “butterfly wing”. If you stay in deep cross court rally’s, the butterfly will come to you. Be patient and the butterfly will come. Take a look at the diagrams of the butterfly patterns for both righty and lefty players. Be sure to include steady deep cross court training in your practices and match play tool box. I realize my diagrams are a bit crude. In the future I hope to provide a more artful illustration.