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
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