I noticed that some pros do a loop on their backscratch (Keurten, Ivanisavich) and some just let the racquet drop (Sampras, Roddick). Is one way better than the other? Why? If you look at the serves of the pros listed above, you can pretty much tell that the loop, or lack of it, is a result of the backswing. Keurten and Ivanisavich have their arm more extended and use their bicep to bring the racquet up. Sampras gets the racquet up just by rotating his shoulder and doesn't open or close his elbow. I've been trying the Sampras way just because it seems more simple and may allow me to reduce the height of my toss. It also seems to require more shoulder flexibility. But then I wonder if the extra motion made by the lower arm during the loop is excess motion that unecessarily complicates the rest of the motion, or if the extra motion contributes to additional racquet head speed. Does anyone know anything about this, or am I being over analytical?