Position after topspin against backspin

After I topspin a backspin ball, should I jump back once, where I can topspin a block, or twice, where I can counter-topspin?
If I jump back twice, and the opponent blocks the ball, how do I topspin it to them?

HI romeo,

I would stay where you are and play the next topspin from a similar position.  That way you will maintain the advantage you gain from making the first topspin.