How can I win my server more often?
The good servers may have the same delivery of the ball, but they changed the velocity and the direction and the targeted area where they feel the receivers weak, like the pitcher in baseball, he doesn’t just throw fastballs, he uses curveballs throws spins, which does not allow the batter to perform well. the server in tennis also has to do the same thing. The movement and ball position will cause players to perform poorly, which helps you win your serve.