In general, Jack has mastered in both strokes the art of the close to optimal body energy unloading (=Tennis 3.0), which goes over the targeted pronation of the entire limb (long-axis pronation). This targeted pronation is possible when, among other conditions, a perfect eye control of the ball leading to optimal spacing is present. Some of the other conditions necessary...
....they also made some improvements on Jack's backhand and then some serious work has been done on Jack's service, which can be considered as quite a weapon now. In this article, I would like to focus on some qualities of this "new Sock service", as he showed them at the ATP 500 tournament in Basel (SUI) few weeks ago already, just before the above mentioned Paris event....
..back then, I was quite impressed by Jack's forehand, which he was unlike most other young Americans of his generation (Harrison, Young, Kudla, etc.) dominating rather by the body than by the arm action. He seemed to me like one who was able to stay immune to the widespread "infection" of the technique focusing at highest possible racket head speed and largely ignoring the importance of the body energy for the successful combination of power and stability/control in the strokes. It was, besides others, also Jack who brought me to the development of the model for the ideal body energy dominated modern forehand - Forehand 3.0...
