Hitting the ball with max power and spin

Hi Alois and Jeff 

For an effective forehand and backhand topspin stroke, where the ball should hit the bat rubber  to ensure max power and spin?

Hi Karim,

For the forehand try to hit it int he middle of your racket or slightly towards the leading edge.

For the backhand topspin also near the middle or closer to the end of the bat away from the handle as this is moving the fastest.