Every Wednesday, this site examines a rule or governing principle that shapes how tennis is actually played. After spending the past several weeks reviewing updates in the 2026 edition of the Friend at Court, we now return to our sequential walkthrough of The Code. For readers who may be new to the organized tennis landscape, Friend at Court is the USTA’s compendium of rules governing sanctioned play in the United States. It includes the ITF Rules of Tennis, USTA Regulations, and additional guidance specific to competition in the United States. Nested within that publication is The Code, the section devoted to the unwritten traditions, expectations, and standards of conduct that guide player behavior. It is, in many ways, the ethical framework of self-officiated tennis.
This week we turn our attention to Principle 8 of The Code.
Ball that cannot be called out is good. Any ball that cannot be called out is considered to be good. A player may not claim a let on the basis of not seeing a ball. One of tennis’ more infuriating moments occurs after a long hard rally when a player makes a clean placement and an opponent says: “I’m not sure if it was good or out. Let’s play a let.” Remember, it is each player’s responsibility to call all balls landing on, or aimed at, the player’s side of the net. If a ball cannot be called out with certainty, it is good. When a player says an opponent’s shot was really out but offers to replay the point to give the opponent a break, it seems clear that the player actually doubted that the ball was out.
USTA Friend at Court 2026 , The Code, Principle 8
As part of this series, I have been using the 2001 version of The Code as a comparison point. That earlier edition often used more expansive language, making it a useful reference for examining how these principles have evolved, and what has remained constant, over the past twenty-five years. However, this principle is largely unchanged between the 2001 version and what appears in the 2026 Friend at Court, with only minor grammatical rewording. That stability is revealing as other parts of The Code have been tightened, modernized, or clarified over time. Principle 8 apparently never warranted that treatment. That suggests that its logic was already well formed.
At its core, Principle 8 answers a question that frequently occurs during match play and naturally follows what was described in previous posts on Principles 6 and 7. What happens when a player honestly does not know if a ball landed in our out? The answer is that the ball is good.
That can feel counterintuitive since human beings instinctively associate uncertainty with compromise. If no one knows for sure, many players assume the fairest resolution is simply to play the point again. Principle 8 rejects that instinct entirely. In self-officiated tennis, uncertainty does not create a let. It creates a good ball.
Lets are for interruptions, not indecision. A let exists when outside circumstances prevent normal play, such as interference, distraction, or procedural disruption. Not seeing a ball clearly is something different. It is not an external interruption. It is a failure to achieve certainty, and previous principles in The Code have already established how that must be resolved.
To recap, this principle is the practical extension of what came immediately before it. Principle 6 established that the opponent gets the benefit of the doubt. Principle 7 required visible separation before a ball can be called out. Principle 8 now closes the loop. If certainty never arrives, the point belongs to the player who hit the shot.
There is also a deeper systems logic at work here. If uncertainty routinely produced replays, close shots would invite negotiation after nearly every difficult exchange. Players would be incentivized to withhold decisions, then bargain for second chances once points were over. Matches would slow, and responsibility for making calls would begin to erode. Principle 8 prevents that drift. Call it out with certainty, or accept that it was good.
That standard may feel harsh in isolated moments, especially after a long point ending in a close call. However, over the duration of a match it provides something more valuable than occasional emotional compromise. It creates consistency, and consistency is what allows self-officiated tennis to function at all.
Next week, we will dive a little deeper into the most familiar phrase embedded in this principle, “Let’s play a let,” and examine why one of the sport’s most common attempts at fairness often misunderstands that concept entirely.
- Friend at Court: The Handbook of Tennis Rules and Regulations, USTA, 2026
- Friend at Court: The USTA Handbook of Tennis Rules and Regulations, USTA, 2001. (Hardcopy.)
For readers who may be new to the organized tennis landscape, the Friend at Court is the USTA’s compendium of all rules governing sanctioned play in the United States. It includes the ITF Rules of Tennis, USTA Regulations, and additional guidance specific to competition in this country. The Code is nested within the Friend at Court. That section outlines the “unwritten” traditions, expectations, and standards of conduct that guide player behavior. The Code is the ethical framework that shapes how recreational and competitive players conduct themselves every time they step onto the court.