Instructions
Place the Wii remote strap around your wrist. Lift the buckle, slide it to where it meets your wrist, and then fasten the buckle. Each Wii remote comes with a wrist strap.
Raise the Wii remote above your head. When you do this, your character in the game throws the ball into the air. The ball will remain in the air for around a second.
Flick your wrist forward while bringing the Wii remote down while the ball is still in the air. If you perform the action right, you hit the ball to the the other side of the court and start a volley.
Play out the point by flicking the remote forward when the ball comes back to you. Repeat the process the next time it's your turn to serve.