This drill develops consistency in your service return and helps to improve your reaction time to the opponent’s serves by placing the server much closer to you.
1) Player A (blue) starts with a basket of balls and serves to Player B (red) on the deuce side. Instead of serving from the baseline, Player A has to serve from the service line as shown in the picture below. Player B just tries to return the serves any way possible. The point is not played out. Player A should serve 10 to 20 good serves to Player B in this manner.
2) This time the balls are served to the ad-side as shown in the below picture. Player A (blue) serves 10 to 20 good serves from the service line to Player B (red.)
3-4) Repeat the drills from step 1 and 2 except the player roles are reversed. Now Player B should serve from the service lines to Player A.