(assuming you are right handed)
An overhead is when your opponent hits a ball high in the air and you hit the ball above your head and aim the ball down.
Step 1: Grip
Hold the racquet like it is a hammer – this is called a “continental grip.”
Step 2: Body and Racquet Position
Move quickly and position your body to be behind the ball. If the ball was to bounce (which you won’t let it do if you are hitting an overhead) it should bounce a foot or two in front of you.
Your left hip should be pointing to the net.
Put your racquet so it looks like you are scratching your back with your racquet.
Point to the ball with your left hand.
Step 3: Swing
Swing your racquet up at the ball and try to make contact on the top of the ball. It should feel like you are throwing a baseball or football. Your arm should be fully extended over your head.
Step 4: Follow Through
Follow through by having your racquet swing past your left calf.