(Tennis Warehouse has measured this for every racquet in 15 locations.) This percentage is known as the power potential (ACOR x 100). The bounce speed is the racquet's contribution to the shot. The impact location speed is the swing's (player's) contribution to the shot. So Equation 2...
You have to really pay attention to the return you get when hit different serves and to different locations. If your opponent has an obvious weaker side, do not be afraid to pick on it as in any serving situation. usually this means backhands, and when you see them cheating to that ...