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Closed: Aug 25, 3:04 PM EST
Kalshi
Gauthier Onclin and Vitaliy Sachko will face off in the 2026 US Open Men Singles Round Of 128, playing a best-of-five set match where the cumulative games played will set the basis for multiple betting thresholds.
All markets refer to the Gauthier Onclin vs Vitaliy Sachko professional tennis match in the 2026 US Open Men Singles Round Of 128. If the match does not occur due to a player injury, walkover, forfeiture, or any cancellation before the first ball is played, markets resolve to a fair price. Postponements or delays keep markets open until the rescheduled match finishes within two weeks. If a retirement occurs, markets based on completed play settle accordingly, while others resolve to Fair Market Price determined by the Exchange. The Exchange holds no official affiliation with the Governing League, and all trademarks belong to their respective owners.