Video 1: http://www.youtube.com/watch?v=GDo4mthLBvA Problem items: little knee bend limited shoulder turn limited "racquet drop" (backscratch) Video 2: http://www.youtube.com/watch?v=gYJv4XL-arc&feature=youtu.be I've improved on the above easy to spot problems, but I'm now noticing a more fundamental problem: My lower and upper bodies are not coordinated. The leg push isn't followed by the waist, shoulders, arm, wrist, etc. Here's a video of Federer I've been studying: http://www.youtube.com/watch?v=wXkAK_iFBuQ Screenshots: Comparing my serve to Roger's. Trophy Pose: I notice: *Roger's right arm is bent more and his racquet closer to his head. *His left arm points directly upward. Back Scratch: I notice: *Roger's elbow is above his head. Mine below. Contact: I notice: *Roger's shoulders have rotated 20 degrees further than mine. *Why is my left arm so close to my body? *How have I managed to land with my right foot forward? *I clearly create more racquet speed than Roger...look @ my blurred racquet! What do you see?