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The Code.

Racquet frame codes dictate head size, weight, and string pattern; learn to decode specs, compare models, and understand performance differences.

001
Rules ·10 min · August 2026

The Code's Principle 12: How Tennis Rules Stopped Negotiating and Started Deciding

We keep rulebooks the way other people keep receipts, and last week two of them ended up open on the same screen: the current edition of the USTA's Friend at Court, which carries The Code, and an…

002
Tennis Rules ·11 min · July 2026

Reversing a Fault Call: The Tennis Rules Exception That Hands the Server Two Serves Back

Call your opponent's first serve out, realize a beat later that you blew it — the ball was in — and you have not lost yourself the point. You have handed the server two fresh serves.