If you want realistic stroke-animations of ATP players and tennis simulation gameplay in my opinion there's one game that beats everything: Dream Match Tennis Pro.
It plays so much better than the topspin series. Dropshots and lobs are actually realistic. There are no strange power bars and it's actually very possible to make errors in this game.
The game is ridiculously cheap, probably because the graphics are quite low-budget looking. However, if you can look past that, you'll see that the strokes look very realistic, especially Federer's backhand, all of Nadal's strokes, Roddick's service, forehand and backhand, Agassi's groundstrokes. The shot parameters are also very realistic. The tactics I found most succesful in a Roddick - Nadal match were actually very similar looking to the strategies those players used when they later met in real life Indian Wells... Other characters are: Sampras, Becker, Edberg, Lendl, Chang, McEnroe, Connors, Borg, Graf (don't know why they included 1 female...). You just need to rename the players as they didn't seem to have licence for the real player names.