# US Open 2026 is finished: why a Ruud contract still appears The official champion is known. A remaining API-open contract is a settlement-status issue, not an unfinished tournament. Canonical article: https://www.homeincomelab.com/stories/2026-mens-us-open-winner-tennis Publisher: The Outlook By: The Outlook editorial desk Category: Sports Analysis as of: 2026-10-04T10:30:51.735578Z Decision guide market prices observed: 2026-10-04T09:57:48.323Z Published: 2026-10-04T10:30:51.735578Z ## Quick answer Alexander Zverev won the 2026 US Open men’s singles title on September 13, according to the tournament’s official report. Our October 4 market data nevertheless retains a Casper Ruud contract at 0.05%. The sporting result and the contract’s open status are separate facts. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) ## Key takeaways - The tournament’s completed result rules out treating Ruud’s residual quote as an ordinary forward-looking title forecast. A small nonzero price in an unresolved record does not reopen a finished competition or overturn the official champion. - The evidence supports settlement consistent with the official Zverev victory. For the remaining Ruud proposition, a qualifying Yes would require Ruud to be the champion, which the published official result does not show. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) - The outstanding uncertainty is why this particular contract remains API-open and when its resolution status will update. This research does not verify a cause such as a dispute, delayed settlement or an administrative error; those should not be invented. ## The comparison behind the headline Alexander Zverev won the 2026 US Open men’s singles title on September 13, according to the tournament’s official report. Our October 4 market data nevertheless retains a Casper Ruud contract at 0.05%. The sporting result and the contract’s open status are separate facts. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) At our October 4 observation, the relevant open contracts read: Casper Ruud 0.05%. These are recorded market prices, not official outcome declarations. The event’s cumulative volume was $26,378,802; that measures turnover across this parent event, rather than money backing any one scenario. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis) ## The detail that changes the question The tournament’s completed result rules out treating Ruud’s residual quote as an ordinary forward-looking title forecast. A small nonzero price in an unresolved record does not reopen a finished competition or overturn the official champion. ## What would strengthen or weaken the case The evidence supports settlement consistent with the official Zverev victory. For the remaining Ruud proposition, a qualifying Yes would require Ruud to be the champion, which the published official result does not show. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) The outstanding uncertainty is why this particular contract remains API-open and when its resolution status will update. This research does not verify a cause such as a dispute, delayed settlement or an administrative error; those should not be invented. ## The evidence that will settle it The market follows the official 2026 US Open men’s singles winner and allows an eliminated player to resolve No. The remaining Ruud record should be interpreted against the already published tournament result. [3](https://polymarket.com/event/2026-mens-us-open-winner-tennis/will-casper-ruud-win-the-2026-mens-us-open)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) The rules specify an October 31, 2026 fallback for cancellation, excessive postponement or no winner, resolving Other. That fallback does not mean the September tournament is still being played; the official winner has already been reported. [3](https://polymarket.com/event/2026-mens-us-open-winner-tennis/will-casper-ruud-win-the-2026-mens-us-open)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) ## A fact worth knowing Zverev beat Ben Shelton in four sets to claim the 2026 US Open men’s singles title. Source: [US Open: Zverev wins the 2026 men’s singles final](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) ## Weighing the outcome ### Outcome in focus Casper Ruud ### Supporting case The evidence supports settlement consistent with the official Zverev victory. For the remaining Ruud proposition, a qualifying Yes would require Ruud to be the champion, which the published official result does not show. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) ### Challenging case The outstanding uncertainty is why this particular contract remains API-open and when its resolution status will update. This research does not verify a cause such as a dispute, delayed settlement or an administrative error; those should not be invented. ### What to watch - The official final result naming Zverev. [2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) - The remaining Ruud contract’s resolution record. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis) - Any explicit platform clarification about the still-open status. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis) ### What may already be priced in The 0.05% snapshot for Casper Ruud records the price at the stated observation time. This explainer does not establish a fair value or show what caused that price. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis) ### Assessment The tournament’s completed result rules out treating Ruud’s residual quote as an ordinary forward-looking title forecast. A small nonzero price in an unresolved record does not reopen a finished competition or overturn the official champion. ## How the market resolves The market follows the official 2026 US Open men’s singles winner and allows an eliminated player to resolve No. The remaining Ruud record should be interpreted against the already published tournament result. [3](https://polymarket.com/event/2026-mens-us-open-winner-tennis/will-casper-ruud-win-the-2026-mens-us-open)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) ## Timing and deadline The rules specify an October 31, 2026 fallback for cancellation, excessive postponement or no winner, resolving Other. That fallback does not mean the September tournament is still being played; the official winner has already been reported. [3](https://polymarket.com/event/2026-mens-us-open-winner-tennis/will-casper-ruud-win-the-2026-mens-us-open)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) ## Questions and answers ### What outcome does this market actually measure? The market follows the official 2026 US Open men’s singles winner and allows an eliminated player to resolve No. The remaining Ruud record should be interpreted against the already published tournament result. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) ### What date matters for settlement? The rules specify an October 31, 2026 fallback for cancellation, excessive postponement or no winner, resolving Other. That fallback does not mean the September tournament is still being played; the official winner has already been reported. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis)[2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) ### What should readers monitor next? The official final result naming Zverev. [2](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) The remaining Ruud contract’s resolution record. [1](https://polymarket.com/event/2026-mens-us-open-winner-tennis) ## Related market contracts - [Casper Ruud](https://polymarket.com/event/2026-mens-us-open-winner-tennis/will-casper-ruud-win-the-2026-mens-us-open) ## Market source [View the event on Polymarket](https://polymarket.com/event/2026-mens-us-open-winner-tennis) For timestamped market prices, see the canonical HTML article. Prices can change independently of this analysis. ## Sources and further reading 1. [Polymarket: 2026 Men’s US Open Winner (Tennis)](https://polymarket.com/event/2026-mens-us-open-winner-tennis) 2. [US Open: Zverev wins the 2026 men’s singles final](https://www.usopen.org/amp/en_US/news/articles/2026-09-13/alexander_zverev_defeats_ben_shelton_to_win_2026_us_open.html) 3. [Exact Polymarket contract: Casper Ruud](https://polymarket.com/event/2026-mens-us-open-winner-tennis/will-casper-ruud-win-the-2026-mens-us-open) This is AI-assisted, source-linked explanatory journalism. We distinguish facts from interpretation and revise material errors. [How we work](https://www.homeincomelab.com/methodology) · [Corrections and contact](https://www.homeincomelab.com/contact)