I play with a SW right now, quite close to a W. I played a match for one week ago and I got pain in my arm. My arm were hitting the ball so slow. The arm felt crampy. What I wonder now is if I should change grip to more strong E like Roger Federer? Now I have played with W and SW but my arm gets pain with both. :cry: The grip I am using now is exactly the same as Djokovic if you wonder. Please help!