What are some tips to improve my tennis serve?

Answer by  panda (65)

Always stay focused. Nothing should distract you. Always look at the where you want the ball to land. Your toss should be 4 feet above your head. Use a flat first serve and a topspin second serve. Turn 90 degrees, bend your knees, and jump. Bring your arm behind your neck, extend completely, and swing down to your left knee.

Answer by  thetruthy (249)

Be sure you have a good rythem on the serve. Be sure to bend your elbow and drop the racquet head down your back. Then swing up through the ball and follow through by your calf.