Why do I lose my serve?
The reason is like the pitcher in baseball, if I pitch the same pitch all the time and the receiver, the batter can figure out how my ball is traveling, and directionally where it’s going, he can get it back. The get the same pitch all the time and get consistency. This is how they get the ball back successfully and that’s why the server loses his serve. Players must change the location and the pitch to keep the play guessing.