My problem is that while playing the forehand I tend to take my eyes off the ball. My head is not still. One reason can be my shoulder turn . Second reason which I can think of is that I open up my shoulders to early. Actually both of these things are inter related. When I try to keep my head still, I do manage to do it but when I try to play an aggressive shot(especially when jumping and hitting) then my head turns away from the ball( due to the fact that my shoulders open to early[Left shoulder moves to early maybe due to the movement of my non hitting arm]) which results in framing the ball or less pace and topspin. I also tend to start arming the ball sometimes. You may associate all these problems with me not correctly transferring the weight of my body into the shot. Can you tell me any off court and on court exercise that can minimize my problem of opening up the shoulders to early and learning to hit with the shoulders as well while keeping my head straight.