I've been wondering about this for my groundstrokes for a while. Should your wrist on a forehand or backhand be locked/straight while hitting your shot, or should it be loose or possibly be used in the stroke itself? On one hand, I've seen that using my wrist really effects my head stability, sometimes I end up hitting really inconsistent shots. But on another hand, I've seen the wrist being used a lot, such as coiling up on a backswing, or for a windshield wiper forehand. I've also heard that Novak uses his wrist a lot Thoughts?