That is a very informative video showing how that player, Karue Sell (Highest ATP Ranking #371, UTR 15.01) watches the ball. He does not direct his head at the ball, but looks well out into the court. When pressured deep, the ball appears to be struck farther back relative to where his head is pointed.
The video shows inconsistency on where the ball is struck relative to where he is looking. Even if his eyes are being redirected, because of the eye's and camera locations he must be seeing what we are seeing in the video to the side in the camera's field of view. Usually, the ball is seen through the back of the racket strings, especially on the backhand side. Many times on deeper heavy paced balls the head was not redirected to be able to get the racket in the camera's field of view.
I looked at many impacts, many others were not visible, but did not view all visible and do percentages. Karue Sell does not use the Federer stable head technique viewing
directed at the ball, nor the Medvedev quick head flick technique, he points his head several feet back into the court. His head is stable. Dojokovic seems to vary his viewing location sometimes. ?
Look at the video and find some forehands and backhands with a good frame showing impact, notice the angle of the racket shaft, that angle usually indicates that he
must be viewing impact through the back of the racket strings.
Based on the title of the video, I was heart broken that Naomi Osaka was not wearing the GoPro head mount.
Official tennis player profile of Karue Sell on the ATP Tour. Featuring news, bio, rankings, playing activity, coach, stats, win-loss, points breakdown, videos, and more.
www.atptour.com
If anyone knows Sell, show him this analysis and tell him that his ball viewing technique is very questionable.
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Greg G, the GoPro head mounted can tell your a lot about your viewing technique. Suggest that you read the thread on watching the ball and pick a technique.
Hi folks, How do you practice tracking the ball, especially at contact? Is there any drill that I can do to improve this? Every time I manage to keep eyes on the ball, it feels so good. But it's so hard to do that the whole time. It's like my brain gets lazy or tired after a while.
tt.tennis-warehouse.com
One issue is that if the ball is struck more forward, impact is more likely to be viewed through the strings from behind. If your ground stroke techniques are not impacting far enough forward then... ???
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@SystemicAnomaly