Hi, i have been using a very slow forehand grip to serve since i started to get back into the swing just to get the ball into play. This weekend i started again using my spin serve(the serve i should be using). I have went by myself about 3 times and i would say i am about 50% on first serve and about 65%-70% on my second. I have a match tommorow if it does rain and my question is, should i use my slower serve with the forehand grip or should i go for the spin serve. Also about 75% of the balls that dont go in go long. Does that mean i am not bending my knees enough when i come up on the ball? thanks. And i was serving about 100 serves each time i went out and i was a little sore after, is this ok? Or does it mean i am serving wrong? I was kind of sore in my shoulder.