Just simple,
This is all.
Study important wrist angle with playing tennis.
Forehand stroke
Easy to use. Fix your wrist to dorsiflexion. It make your racket stable. You can get powerful shot.
Forehand volley
Change grip to continental. Fix your wrist to dorsiflexion. Automatically ball speed is accelerate. And less miss shots
One handed backhand
Fix your wrist to radius flex. When backhand volley, stroke, slice shot, drop shot, start from this wrist angle.
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Why improve tennis?
Tennis Wrist COC
Study usage your body to improve tennis
A reason of miss shot may be too much movement wrist.
There is incorrect wrist flex direction to accelerate racket head.
It cause unstable racket face direction, and out or net miss.
Fix appropriate wrist angle to powerful shot.
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Compact
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Simple
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Adjustable