ok, here is a tennis game with a realistic game play. The controls are quiet complex but if u play long enough u get the hang of it. A real tennis fan like me would apreciate it.
Moving: J, K, I, L
Hitting ball: A,S,D (forehand is when the ball hits yo rocket when u begin yo swing, backhand is when u end yo swing. A is shortest, D is the longets hit)
Serving/receive serve: H
Switching rockets: Space Bar
applet resolution: 1000 x 700
EDIT: forgot to tell u: the blue circle marks the quadrant where u should serve or where the opponent will serve. if u press H and nothing happens u should move behind the baseline or to the opposite side of the serving quadrant (or u could read about tennis rules on the internet).