Dr. Jack Groppel: Laws, Principles and Preferences In Tennis

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We talk:

:51 What is "high performance"?

4:50 Laws, principles and preferences

11:33 Making sure you're getting SOLID information

15:18 Listening as an online tennis coach

18:25 The most important part of tennis

26:40 Mountains Within

31:18 What he's working on with his 3.5 ladies