I was trying to figure out what the best strokes were for the varying surfaces. I know that claycourters generally put a lot of topspin on their shots, and grasscourters generally have flatter shots. I've heard different explanations for each, so I wanted to get something definitive of why each is best. Could anyone give a good explanation, or refer me to a good article describing the strenghts of each surface (clay, hard, grass). Thanks.