I've read Oscar Wegner's book and liked it. I dont know alot about tennis but i have been researching some things about modern forehand. I have a question concerning my forehand. Im trying to make my self hit a reasonbly "heavy" ball with good amount of topsin. But i m not successful. Most of the balls i hit are fast and have some spin but it doesnt seem to have any wait behind it. I know strength has alot to do with it but is their anything else i could do. I believe im following through (arching circular motion) finishing with racquet back behind me and racquet butt cap pointing forward. (pull back)(pulling the towel)-nick bolliterri phrase. Please help. I am also aware of how the elbow should sometimes stay locked or in a fixed position and how the racquet head must pronate at the right time. If i could just hit a few serious "heavy" balls it would deeply appreciated. How does one achieve this?