Not even sure if this is completely accurate but I mentioned before 2K Czech (the makers of Top Spin 4) are helping Rockstar on GTA V (both Take Two owned companies) and tennis is a confirmed minigame which you would think 2K Czech are working on. Anyway within the last few weeks some people have been saying they had recorded motion captures of Djokovic, Nadal and Federer for the game. Assuming it is true it can only mean 2K Czech are going to then use them afterwards for Top Spin 5 because there's no way they would spend so much on that only for a minigame in GTA.
Agree with Johnbert. Virtua tennis is awful compared with Top Spin, the mechanics and lack of variety on your shots. ^The slice in VT4 is useless.
Grand slam tennis 2 looks good but I've never played.
Grand Slam Tennis 2 is truly awful, you're better off keeping away from it.