followthrough

The follow through of the serve is technically every point past the contact with the ball.

After contact, you should basically be in the air, in mid jump.

The jump should be forward and you should not land before you make contact with the ball. If you were to land before you hit the ball, it would be a foot fault which basically means it doesn't count. You have to start over. Usually, a player will jump about six inches to a foot into the court. (which means in whole the jump is about a foot six inches to two feet, adding the foot behind the baseline where the player started).

The landing should be light. The left foot should be in front of the right and the left should have all the weight on it. The right shouldn't have any weight and therefore, a lot of the time people land with their right foot in the air or the toes only touching the ground.

The hardest part of the follow through is making the racket come over the correct side of the ball.

In this, it is meant that though you are hitting the ball towards the right, you're coming over the right side of the ball and therefore your racket turns 360 degrees in the process. By the end of the serve, your racket face should be facing to the left of you.

It is very important to get immediatly ready for the next shot.