Last updated on 26-Sep-2008 04:22:55 PM
Hi Abhinav,
You can the a topspin from any of these points. Probably the easiest point to start with is as the ball is just starting to fall. Experiment for yourself and see which feels right for you.
Trying to hit the ball as it is rising can be difficult but it is also effective because it gives your opponent less time.
The top of the bounce can be better for faster topspins.