Need some help please!! I've been playing with a stock Tour 10 MP, strung with Volkl Dura-Drive at 55lbs for the last 4 months. I play 3-4 times per week, singles, doubles and have some coaching as well. The last two weeks my shoulder has been hurting, particularly when serving, and it's really starting to bother me. Any suggestions to remedy the problem? Do I need to beef my arms up or do I need to look for a new racquet before my shoulder is completely wrecked?? If I need to get another stick can anyone suggest a similar racquet to the tour 10 in terms of feel, comfort & power?? Hope you can help.