Latest Posts

The Incentive Problem Hidden Inside NTRP Ratings Why the NTRP Ratings System Is Complex, Not Just Complicated The Cruelest Game: Chasing Greatness in Professional Tennis The Code, Principle 13: Why You Cannot Call Your Own First Serve Out Soccer Bell Touches for Better Tennis Footwork Tennis Beyond the Headlines: August 17, 2026 Try Harder? What a DEF CON Challenge Teaches Us About Resilience

The Tennis Ball and the Metric System

This week we are moving into the Appendices of the “ITF Rules of Tennis”. It is tempting to celebrate the milestone, but we still have a long way to go. The main body of the rules concludes on page 19 as published in the USTA’s “Friend at Court.” The appendices run through page 36. The first topic on the docket as we continue to march through the rules is Appendix I, “The Ball.”