SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/tennis-code-doubt-in

What should you call if you are not sure whether a shot was out?

Call it in. Doubt goes to your opponent.

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  1. Out to keep pressure on
  2. Let and replay the point
  3. In, because doubt goes to your opponent ✔

Why: The Code says any doubt is resolved in favor of your opponent. A ball you cannot call out is good, and you may not claim a let because you did not see it.

Huh, didn't know that: If you ask your opponent and neither of you has an opinion, the ball is good (The Code, section 11).

The dad joke
Why do tennis players make good detectives? They never call out unless there is clear evidence.
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References

Answer: In, because doubt goes to your opponent. The Code says any doubt is resolved in favor of your opponent. A ball you cannot call out is good, and you may not claim a let because you did not see it.

  1. USTA 2026 Friend at Court, The Code section 8 www.usta.com/content/dam/usta/officiating/friendatcourt.pdf
    Any ball that cannot be called out is considered to be good.
    Checked 2026-10-13.
  2. USTA 2026 Friend at Court, The Code section 11 www.usta.com/content/dam/usta/officiating/friendatcourt.pdf
    If neither player has an opinion, the ball is considered good.
    Checked 2026-10-13.

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Test yourself in the game

Sports & FitnessWho makes line calls on your side in an unofficiated tennis match?Sports & FitnessAccording to The Code, when should you make your line call?Sports & FitnessWhen should you call a ball out under The Code?

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