So says Vic Braden, teacher, psychologist, stand-up comic, who is convinced most players fail to live up to their potential because they don't consider the physical laws governing the game. Here, multiple exposures by John G. Zimmerman freeze the image of Braden in action and prove some of his points
Ideally hit, backhand and forehand are mirror images except for the slight hook at the end of the forehand because the racket must cross the body. Observing the head, one can see how the body dips in the middle of a stroke, then ends high.
A front view of service (far left) shows there is no pause in the stroke. Note the wrist turning inside out (center), putting stress on the elbow. When seen from behind, the toss arcs forward and the torso rotates.