I also played this game, I was not good in it.
Best result was SF in a future.
The key is first to train and then go out and play.
I reached top 20 before playing Roland Garros (second year).
I also managed Juan Martin Del Potro and Gaston Gaudio. 23 and 25 there were when the game stpped because of reaching top 20.
Now yes, I wont play again until i have the full version its so frustrating.