I never thought there'd a decent tennis game built in flash, to be played online. I was wrong! This has a similar feel to the Xbox tennis game, but with obviously far more advanced graphics ;).
It's actually kind of tough to get the hang of this game. But once you do, it's a lot of fun to play. Give it a go, and leave your best scores in the comments!
To serve, you have to press spacebar and move the arrow keys to where you want to serve, and let go of the spacebar when the arrow hits the right spot
To return the ball, move your player into the right location, and use the space bar to swing.
Hope the French wording doesn't throw you off!