The Loriciel Tennis game from the other thread it Tennis Cup 2 (Dunno if the 1st one supports it), and the ubi soft one is Great Courts 2 (I also never played the 1st one)
Base Jumpers is a nice platform game that can be played with 4 players, and it's a very fun one.
Over The Net , if I am not mistaken, uses it too. It's a nice beach volley game.
Can't remember any other game now.