OTI Instructor Florian Meier helps you master a key movement that puts more power behind your serve.
More: Tennis Videos from OTI
READ THIS NEXT: The No. 1 Secret for Great Movement
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OTI Instructor Florian Meier helps you master a key movement that puts more power behind your serve.
More: Tennis Videos from OTI
READ THIS NEXT: The No. 1 Secret for Great Movement
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