Sinner did get a knockdown of Monfils
inside shoulder
big up and out on the backhand one handed follow through — motor is the inside shoulder
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knockdown
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more get big
on the serve get big
hug
on the serve — bring the hitting had to the opposite pocket
knees in heals up
one way to think of adding your knees is to push the knees in and get on your toes by getting your heals up