Chapter 4 of Advanced Concepts of Strength & Conditioning for Tennis covers flexibility testing and performance testing. Use a test to identify a specific limitation, then follow the book’s recommended exercises and retest under comparable conditions.
Flexibility tests use photographs to show the positions and scoring criteria. Follow the tennis book’s setup and measure both sides where specified.
These Chapter 4 pages show the movement and explain the full test protocol. Short videos demonstrate the exercise; follow the stated timing, equipment and scoring to collect a result.
The corresponding Stability Pad Squat exercise provides the related training resource when the test identifies a deficiency.