If the server moves their paddle from your left top right across the ball, then add the ball cones toward you its trajectory will bend to your left. You’ll want to hit it further left, otherwise it will bounce off your racket to the right and go out. How best to think about this? The ball is spinning to your left; that’s why the trajectory bends to your left. By “spinning to your left”, I refer to the direction the part of the ball leading the trajectory is moving in. Since the ball...