Serve
Swing the Wiimote from down to up to toss the ball up, then swing to serve.
Top Spin
Swing from lower right to upper left for forehand. Reverse for a backhand.
Slice Spin
Swing from upper right to lower left for forehand. Reverse for backhand.
Flat Shot
Swing from right to left for a forehand. Reverse for a backhand.
Lob
Swing the Wiimote from down to up.
Drop
Swing the Wiimote from up to down.
Smash
When presented with a smash opportunity, a star will appear on the court. Move your character over the star, then swing up to down to perform a smash.
Source: http://wii.ign.com/articles/942/942198p1.html
Swing the Wiimote from down to up to toss the ball up, then swing to serve.
Top Spin
Swing from lower right to upper left for forehand. Reverse for a backhand.
Slice Spin
Swing from upper right to lower left for forehand. Reverse for backhand.
Flat Shot
Swing from right to left for a forehand. Reverse for a backhand.
Lob
Swing the Wiimote from down to up.
Drop
Swing the Wiimote from up to down.
Smash
When presented with a smash opportunity, a star will appear on the court. Move your character over the star, then swing up to down to perform a smash.
Source: http://wii.ign.com/articles/942/942198p1.html