Lately I have been quite happy with how I have chased down some balls hit wide to my backhand. I get the jump on the ball. It is way out of reach but I get there and get a racket on it. BUT, then I have no power. I am stretched out and the ball is nearly by me. The shot is very weak if it gets over the net at all. I have seen the pros hit these balls and they somehow find enough power to get them back deep. What are they doing??? Is there a different grip for this shot???