I have been self-learning tennis for an year now. I can now hit both 1st and 2nd serves consistently, main options being slice, topspin and kick serve. Still developing a consistent flat serve. One area for improvement is for me to serve in such a way that my toss does not indicate to the opponent where the serve will go. Right now, my toss is a very easy giveaway of my intention. Toss on the side => slice. Overhead => topspin. Overhead and on side => Kicker How should I approach this issue?