Well I've had so many changes to my game this year I don't really know what the cause is.. - I switched to a PD+ from LM Prestige and really like the spin and pop on my serves now. - Started hitting harder flat serves - Playing 6-7 days a week instead of 2-3 days a week My elbow is fine when I'm not playing but 10 minutes into serving and I can barely grip anything. My elbow is in extreme pain. When I first switched to the PD+ I didn't really experience any problems but then I started hitting hard flat serves the elbow started to feel it. So it could be because of the serves and not the racquet. Or it could be because I play too much and don't get enough rest. I guess I'm going to switch back to the LM Prestige for a week and see if that fixes the problem. I'm going to miss the extra topspin groundstrokes and pop on my serves if I can't use the PD+ though.