One of the best tennis fitness benchmark tests for junior players is the spider drill. At a minimum, this test should be done yearly, however I recommend seasonally or 3 times per year.
The drill is very simple and is done on a tennis court. You place five balls at the intersection of the 3 inside linear lines of the court. Baseline-singles sideline ad side; service line-singles sideline ad side; baseline-singles sideline deuce side; service line-singles sideline deuce side; and lastly, the center line-service line.
The player starts at the center baseline and is timed. Pick up one ball at a time and drop on a racquet that is placed on the baseline center. The timer is stopped when the last ball is placed. Times should range between 15 seconds for elite athletes to 22 seconds for a minimum speed to play full court tennis. Times that are over 22 seconds may not be ready for full court tennis. Times between 18-20 seconds are average for MS and HS tennis players.
Find Your Game 