Every Wednesday, this site examines a rule or governing principle that shapes how tennis is actually played. We are currently in the midst of a sequential walkthrough of The Code, exploring one principle at a time as it appears within the USTA’s Friend at Court. Last week, we explored the first half of Principle 12 and the psychological challenge of reversing one of your own line calls. This week, we turn to the second sentence of that principle, which answers a question many recreational players instinctively get wrong.
Out calls reversed. A player who calls a ball out must reverse the call if the player becomes uncertain or realizes that the ball was good. The point goes to the opponent and is not replayed. However, when a receiver reverses a fault call on a serve that hit the net, the server is entitled to two serves.
USTA Friend at Court 2026 , The Code, Principle 12
For many players, the instinctive reaction is to replay the point. That impulse is understandable. If a player honestly realizes that they made an incorrect out call, replaying the point can feel like the fairest solution. Nobody intended to make a bad call, and giving both players another opportunity seems, at least on the surface, like a reasonable compromise.
Principle 12 rejects that idea. Instead, it awards the point to the opponent. At first glance, that outcome can seem harsh. After all, the player did the right thing. They recognized their mistake and corrected it. Why should they lose the point instead of simply getting another chance?
The answer becomes clear only when we focus on what actually happened. The opponent hit a good shot, and the point did not continue because an incorrect out call stopped play. Replaying the point does not restore fairness because it creates a second opportunity for the player who made the incorrect call in the first place.
Viewed from that perspective, awarding the point to the opponent is not a penalty for correcting the mistake. It is simply the logical consequence of acknowledging that the erroneous call took opportunity away from the other team.
Throughout this walkthrough of The Code, we have repeatedly encountered situations where the instinctive response is to compromise. Players suggest replaying uncertain points. They propose lets when nobody is sure what happened. They search for outcomes that feel emotionally balanced in the moment.
The Code rejects the idea that such points should be replayed. Instead, it reflects a bias for clear and consistent determinations of who won the point.
Self-officiated tennis depends on players accepting responsibility for their calls. If every corrected mistake simply resulted in a replay, there would be very little practical difference between making a correct call and making an incorrect one that was later reversed. By awarding the point to the opponent, Principle 12 preserves accountability while simultaneously encouraging players to correct honest mistakes.
Players should never hesitate to reverse a call out of fear of admitting they were wrong. However, they should also recognize that correcting an incorrect call does not erase its consequences. The opponent had already won the point with a good shot. Principle 12 simply restores that outcome.
That may not always feel satisfying. In fact, many of the principles in The Code require players to resist their immediate instincts in favor of standards that produce a fair match.
Next week, we will examine the lone exception to this rule. When a receiver reverses a fault call on a serve that clipped the net, The Code abandons its normal remedy and restores two serves. As we will see, that exception reveals just as much about the philosophy of self-officiated tennis as the rule itself.
- 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.)
