GUIDES · BETSLIP DOCTOR
If players discover during a tennis tiebreak that they started at the wrong ends, does a fault served before discovery stand?
Under the ITF 2026 Rules of Tennis and its Rule 27 clarification, players correct a wrong-ends error when it is discovered. Points already played stand, but a fault served before discovery of that error does not. The server then uses the end required by the score. This result is specific to being at the wrong ends; a fault from serving in the wrong half of the court is treated differently.
For Tennis viewers and players following a tiebreak after an end-change or court-position error · Updated
Correct a wrong-ends error when it is found
Rule 27 preserves points that were completed before the error was discovered. Once the players realize that a tiebreak began at the wrong ends, they correct the ends and continue from the end required for the score.
The 2026 clarification says a fault served before discovery of the wrong-ends error does not stand. That changes the fault’s status, not the result of points already played.
Wrong ends is different from the wrong service half
This exception is limited to the wrong-ends correction. Serving from the wrong half of the court is a separate Rule 27 error, with a different treatment of a fault served before discovery. Do not use the tiebreak wrong-ends result as a general correction for every serving-position mistake.
Check which rule set the competition uses
This explanation follows the ITF 2026 English text and amendment. The amendment identifies a 2026 clarification but does not give an adoption date for every event. Check the governing competition rules before applying it to a particular match.
A fictional tiebreak corrected mid-match
Imagine a made-up tiebreak that started with the players at the wrong ends. After one server commits a fault, the official notices the end error before the next point. The players correct their ends; earlier points remain, and the fault from before discovery does not stand. If the fault instead came from serving from the wrong half of the court, that would be the separate Rule 27 case and the fault would stand.
Related questions
Are points played before the wrong-ends error is found replayed?
No. Rule 27 says points already played stand when the error is corrected.