I just can't get into tennis video games. Not even Mario Tennis. Just feels like glorfied Pong to me.
However, there is ONE tennis game I did like: SEGA Superstars Tennis. I think it was on the PS2 and GameCube, and starred a bunch of SEGA characters playing tennis. They also had tennis style mini games based on SEGA games, too. Like Space Harrier and ChuChu Rocket themed tennis game challenges. It was really neat.
Of course, another reason why I liked that game was Ulala was a playable character. Any game with her in it can't be all bad, right? :)