I'm a sucker for tennis games, and this one isn't that bad. The only tennis game I know of with a quest mode (RPG) where you purchase new rackets, clothes, and shoes. Random battles are tennis matches. Kind of a neat concept. Not the greatest game out there, but it far outshines most of the sports games you'll find on the turbo.
If you have four controllers and a turbo tap and three other goons lurking about- then this is one of the most fun games ever. If you're on your own then the quest mode is a blast and is pretty much the sister game to the Final Lap Twin quest...