Anyone have a clip of their topspin serve, or know of a video clip of one?... I've been trying to get this down to improve my 2nd serves but it just isnt happening.. I get the arc and topspin on the ball, but theres just no power to the serve. I have racquet head speed but its all brushing and no forward motion (i think).. Would be nice if I could see frame by frame, a proper topspin serve.. Thanks Or any tips would help..