Originally Posted by Sakkijarvi
I agree with LeeD on your serve. Your feet never leave the ground, so you'll never get enough torque, spin and pace serving that way. You have to go UP and attack the ball, think in terms of your max vertical leap and you begin to get the idea. That height, that energy ... separates the men from the boys in terms of serve. You look too young to be pinned to the earth.
Thanks for the tips, Sakkijarvi!