@toth @Morch Us
Not exactly. Andre never fixes his gaze on his CP (zone). He stops tracking the ball shortly before it gets there.
Roger, doesn’t watch watch the ball all the way into contact either. I recall seeing some very high speed film of Roger hitting a Fh. He appears to track the incoming ball early in his forward swing. However, when the ball is in closer proximity, Roger turns his head a bit more and his eyes jump ahead to his CP. His eyes get to the CP shortly before the ball does. Therefore, he’s not really
following the ball all the way into his strings.
He often looks like he is looking at the ball thru his strings. However, both the ball and the racket are moving thru the contact zone and across his field of vision so rapidly, it is doubtful that he sees a solid ball or a solid racket shortly before or after contact. Does he really actually see the ball thru his strings? Seems doubtful. Both the ball and the racket would, at best, be an amorphous blur.
Even on a fast (120 mph) serve, the transit time from the server’s racket to your racket would be something close to 1000 ms. For a 60 mph groundstroke, the transit time might be 1500 to 1700 ms or so. Somewhat short but ample time to track the ball compared to other sports. A baseball fastball might reach a batter in 400 ms or so. The transit time for badminton and ping pong (table tennis) is typically also considerably shorter than it is for tennis.
Not sure I understand your last question here since, I believe, that I previously answered where / when the ball is no longer being tracked with the smooth pursuit tracking system.