This is a realistic tennis simulation that lets you play opponents all over the world via the Internet. Players everywhere can vie for the coveted number one ranking; rankings are updated instantly after every online match. Even your computer opponents can't help being swayed by their emotions, which according to the developer affect their gameplay. The 3D modeling is very realistic, and you can hit your shots flat or with topspin or underspin (and see different strokes for each). You can vary the speed of your shots by holding down the Hit button for a longer amount of time before making contact. Serving can be tricky, but it's easy to learn. The registered version includes 169 tournaments on 13 different courts, spanning all four major court surfaces.