# US Open Women's Singles Winner

2026 US Open Women's Singles

Updated: September 5, 2026

Category: Sports

Tags: Tennis

HTML: /markets/sports/tennis/us-open-women-s-singles-winner/

## Short Answer

**Aryna Sabalenka is considered unlikely by the market to win the 2026 US Open Women's Singles, despite her status as a two-time defending champion with a dominant 2026 hard-court record and current progress through the tournament.** This **market** view (**25.0%**) diverges significantly from the **model**'s **43.1%** **probability**.

## Key Claims (September 2026)

**- -   Aryna Sabalenka is the outright favorite, defending champion with a dominant 2026 hard-court record.** -   Gauff, Swiatek, and Rybakina are key contenders, but face particularly challenging draw paths.

## Market Behavior & Drivers

Aryna Sabalenka's dominant hard-court performance and advancement through three rounds of the 2026 US Open are currently driving the **market**.

This market's primary movement reflects changing sentiment immediately before and during the opening week of the 2026 US Open. The contract price rose from 4.0% to a peak of 5.0% on August 29, the day before the tournament began. This move suggests an initially favorable reaction to pre-tournament information, such as the official draw, which can significantly alter a player's path to the final.

By September 5, with the tournament's first week nearly complete, the price had reverted to its 4.0% baseline. This repricing indicates that the initial optimism was not borne out by early-round results. Either the player's performance was unconvincing, or strong showings by other contenders in the field diluted the contract's perceived chances.

The market has otherwise remained in a tight sideways channel. The low absolute probability, never exceeding 6.0%, is consistent with a large field of potential winners in a major tournament. Without a dominant favorite emerging, the contract's value has hovered near its opening price, reflecting the broad uncertainty that is typical in the early stages of a Grand Slam event.

### Who Wins and Why

| Outcome | Market | Model | Why |
| --- | --- | --- | --- |
| Alexandra Eala | 4.0% | 4.6% | Seeded #17, she is a "notable threat" but not considered a top-tier contender. |
| Coco Gauff | 17.0% | 15.5% | She is a top contender but faces a difficult draw with many strong opponents. |
| Aryna Sabalenka | 25.0% | 43.1% | She is the two-time defending champion and has a dominant 25-1 hard-court record in 2026. |

## Model vs Market

| Outcome | Market Probability | Octagon Model Probability |
| --- | --- | --- |
| Alexandra Eala | 4.0% | 4.6% |
| Coco Gauff | 17.0% | 15.5% |
| Aryna Sabalenka | 25.0% | 43.1% |
| Elena Rybakina | 6.0% | 10.6% |
| Jessica Pegula | 9.0% | 9.2% |
| Naomi Osaka | 4.0% | 4.2% |
| Amanda Anisimova | 4.0% | 4.6% |
| Iga Swiatek | 14.0% | 13.0% |
| Marta Kostyuk | 4.0% | 4.6% |
| Emma Navarro | 1.0% | 1.3% |
| Linda Noskova | 3.0% | 3.5% |
| Qinwen Zheng | 1.0% | 1.0% |
| Madison Keys | 2.0% | 2.2% |
| Mirra Andreeva | 5.0% | 5.7% |
| Iva Jovic | 2.0% | 2.4% |
| Taylor Townsend | 1.0% | 1.2% |
| Victoria Mboko | 1.0% | 1.2% |
| Anastasia Potapova | 1.0% | 1.2% |
| Cristina Bucsa | 0.0% | — |
| Yuliia Starodubtseva | 0.0% | — |

- Expiration: September 27, 2026

## Contract Snapshot

For a "YES" contract to resolve, the specific player named in the contract must win the US Open Women's Singles tournament. Conversely, a "NO" contract resolves if that player does not win the tournament. The market event is indicated to begin on Thursday, September 10, at 8:00 PM EDT, with the maximum payout date listed as September 26, 2026. No other special settlement conditions are specified in the provided content.

## Market Discussion

As of early September 2026, prediction markets identify Aryna Sabalenka, the two-time defending champion and top seed, as the favorite to win the 2026 US Open Women's Singles title, with implied probabilities generally ranging from 21% to 26% [[^]](https://polymarket.com/event/2026-womens-us-open-winner-tennis). Coco Gauff and Iga Swiatek are widely viewed as primary challengers, often priced around 16% and 12-15% respectively, while Elena Rybakina is considered a high-upside option, with some traders citing her 2026 Australian Open victory [[^]](https://polymarket.com/event/2026-womens-us-open-winner-tennis). Public discussion also includes debates on tournament fairness, specifically concerning court assignments for emerging players like Alex Eala versus established Grand Slam champions such as Iga Swiatek [[^]](https://www.essentiallysports.com/tennis-news-tennis-fans-slam-us-open-for-giving-alex-eala-special-treatment-over-iga-swiatek/).

## Market Data

| Contract | Yes Bid | Yes Ask | Last Price | Volume | Open Interest |
| --- | --- | --- | --- | --- | --- |
| Cristina Bucsa | 0% | 1% | 0% | $0 | $0 |
| Anastasia Potapova | 0% | 1% | 1% | $1,870.38 | $1,870.38 |
| Yuliia Starodubtseva | 0% | 1% | 0% | $0 | $0 |
| Taylor Townsend | 0% | 2% | 1% | $41,740.11 | $41,740.11 |
| Mirra Andreeva | 4% | 5% | 5% | $62,728.63 | $58,164.77 |
| Amanda Anisimova | 3% | 4% | 4% | $163,416.39 | $155,244.16 |
| Alexandra Eala | 3% | 4% | 4% | $541,472.05 | $406,534.12 |
| Coco Gauff | 17% | 18% | 17% | $515,306.48 | $381,117.66 |
| Iva Jovic | 1% | 2% | 2% | $51,364.8 | $49,346.14 |
| Madison Keys | 1% | 2% | 2% | $71,590.89 | $68,934.59 |
| Marta Kostyuk | 3% | 4% | 4% | $97,246.56 | $93,785.49 |
| Victoria Mboko | 0% | 1% | 1% | $7,829.35 | $7,792.35 |
| Emma Navarro | 0% | 1% | 1% | $87,143.64 | $86,581.05 |
| Linda Noskova | 2% | 3% | 3% | $87,116.26 | $77,806.96 |
| Naomi Osaka | 3% | 4% | 4% | $184,278.33 | $173,314.88 |
| Jessica Pegula | 8% | 9% | 9% | $189,791.9 | $151,908.57 |
| Elena Rybakina | 6% | 7% | 6% | $217,489.97 | $148,498.18 |
| Aryna Sabalenka | 24% | 25% | 25% | $270,347.26 | $204,035.98 |
| Iga Swiatek | 13% | 14% | 14% | $147,851.17 | $112,931.59 |
| Qinwen Zheng | 0% | 1% | 1% | $75,667.99 | $68,167.92 |

## How do top contenders Iga Swiatek and Aryna Sabalenka compare on key hard-court performance metrics and their head-to-head record in 2026?

Aryna Sabalenka 2026 Hard-Court Record | 25-1 as of September 5 [[^]](https://wtafiles.wtatennis.com/pdf/publications/2026MG/2026WTA_ByTheNumbers.pdf)[[^]](https://wtafiles.wtatennis.com/pdf/matchnotes/2026/2026WTA_ByTheNumbers.pdf)[[^]](https://www.wtatennis.com/news/4554255/by-the-numbers-sabalenka-extends-hard-court-winning-streak-to-13-in-toronto)[[^]](https://www.wtatennis.com/news/4555595/sabalenkas-clutch-play-late-seals-win-over-zhang-sends-her-into-toronto-round-of-16) |
Iga Swiatek 2026 Hard-Court Record | 12-6 as of September 5 [[^]](https://tennistonic.com/head-to-head-compare/Aryna-Sabalenka-Vs-Iga-Swiatek/)[[^]](https://en.wikipedia.org/wiki/Iga_%C5%9Awi%C4%85tek_career_statistics) |
Career Head-to-Head Record | Iga Swiatek leads 8-5 [[^]](https://www.tennisratio.com/h2h-compare/aryna-sabalenka-vs-iga-swiatek.html)[[^]](https://www.thetennisgazette.com/news/how-aryna-sabalenkas-record-on-every-surface-now-compares-to-iga-swiateks/)[[^]](https://tennistonic.com/head-to-head-compare/Aryna-Sabalenka-Vs-Iga-Swiatek/) |

**Aryna Sabalenka has demonstrated dominant hard-court performance in the 2026 season**

Aryna Sabalenka has demonstrated dominant hard-court performance in the 2026 season. As of September 5, 2026, Sabalenka has compiled an impressive 25-1 record on hard courts. Her only hard-court defeat this season occurred in the Australian Open final against Elena Rybakina [[^]](https://wtafiles.wtatennis.com/pdf/publications/2026MG/2026WTA_ByTheNumbers.pdf)[[^]](https://wtafiles.wtatennis.com/pdf/matchnotes/2026/2026WTA_ByTheNumbers.pdf)[[^]](https://www.wtatennis.com/news/4554255/by-the-numbers-sabalenka-extends-hard-court-winning-streak-to-13-in-toronto)[[^]](https://www.wtatennis.com/news/4555595/sabalenkas-clutch-play-late-seals-win-over-zhang-sends-her-into-toronto-round-of-16). Sabalenka has secured three significant hard-court titles this year, triumphing in Brisbane, Indian Wells, and Miami [[^]](https://tennistonic.com/head-to-head-compare/Aryna-Sabalenka-Vs-Iga-Swiatek/)[[^]](https://en.wikipedia.org/wiki/2026_Aryna_Sabalenka_tennis_season)[[^]](https://en.wikipedia.org/wiki/Aryna_Sabalenka_career_statistics). Furthermore, she currently leads the WTA in several key 2026 hard-court statistical metrics, including Service Games Won (**83.6%**), Service Points Won (**65.4%**), and Second Serve Points Won (**54.3%**) [[^]](https://wtafiles.wtatennis.com/pdf/publications/2026MG/2026WTA_ByTheNumbers.pdf).

Iga Swiatek has maintained a strong 2026 hard-court campaign. As of September 5, Iga Swiatek has achieved a solid 12-6 record on hard courts [[^]](https://tennistonic.com/head-to-head-compare/Aryna-Sabalenka-Vs-Iga-Swiatek/)[[^]](https://en.wikipedia.org/wiki/Iga_%C5%9Awi%C4%85tek_career_statistics). Her notable accomplishment includes winning the Canadian Open title, where she defeated Elena Rybakina in the final [[^]](https://en.wikipedia.org/wiki/Iga_%C5%9Awi%C4%85tek_career_statistics)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=IgaSwiatek)[[^]](https://www.tennisabstract.com/charting/20260813-W-Toronto-F-Elena_Rybakina-Iga_Swiatek.html). While the career head-to-head record between Swiatek and Sabalenka stands at 8-5 in favor of Swiatek, the two top contenders have not yet competed against each other in the 2026 season [[^]](https://www.tennisratio.com/h2h-compare/aryna-sabalenka-vs-iga-swiatek.html)[[^]](https://www.thetennisgazette.com/news/how-aryna-sabalenkas-record-on-every-surface-now-compares-to-iga-swiateks/)[[^]](https://tennistonic.com/head-to-head-compare/Aryna-Sabalenka-Vs-Iga-Swiatek/).

## How has two-time defending champion Aryna Sabalenka's performance in the opening rounds of the 2026 tournament validated her favorite status?

Implied Win Probability | 23% to 30% [[^]](https://kalshi.com/markets/kxwta/womens-tournament-winner/kxwta-26uso)[[^]](https://news.kalshi.com/p/2026-us-open-womens-singles-odds-sabalenka-favored)[[^]](https://thebestpredictionmarkets.com/compare/us-open-women-s-singles-winner) |
Predictive Model Win Probability | 29.9% [[^]](https://www.tennisabstract.com/current/2026USOpenWomenForecast.html) |
US Open Winning Streak | 16 matches [[^]](https://www.wtatennis.com/news/4569739/sabalenka-starts-us-open-title-defense-with-straight-sets-win-over-osorio)[[^]](https://www.wtatennis.com/news/4572249/sabalenka-handles-early-armstrong-assignment-to-extend-us-open-win-streak-to-16)[[^]](https://www.wtatennis.com/news/4571326/aryna-sabalenka-storms-into-us-open-third-round-with-24-winners-to-polina-iatcenkos-3) |

**Aryna Sabalenka has cemented her favorite status for the 2026 US Open**

Aryna Sabalenka has cemented her favorite status for the 2026 US Open. The two-time defending champion has been identified as the clear favorite by prediction markets such as Kalshi, which list her with implied win probabilities typically ranging between **23%** and **30%** [[^]](https://kalshi.com/markets/kxwta/womens-tournament-winner/kxwta-26uso)[[^]](https://news.kalshi.com/p/2026-us-open-womens-singles-odds-sabalenka-favored)[[^]](https://thebestpredictionmarkets.com/compare/us-open-women-s-singles-winner). Complementing this, predictive models from Tennis Abstract estimate her **probability** of winning the 2026 US Open title at **29.9%** [[^]](https://www.tennisabstract.com/current/2026USOpenWomenForecast.html). This status is validated by her efficient navigation of the opening three rounds of the tournament [[^]](https://www.usopen.org/en_US/news/articles/2026-09-04/how_aryna_sabalenka_finds_focus_amid_hype_and_noise_at_the_2026_us_open.html)[[^]](https://www.wtatennis.com/news/4569739/sabalenka-starts-us-open-title-defense-with-straight-sets-win-over-osorio)[[^]](https://www.wtatennis.com/news/4572249/sabalenka-handles-early-armstrong-assignment-to-extend-us-open-win-streak-to-16)[[^]](https://www.wtatennis.com/news/4571326/aryna-sabalenka-storms-into-us-open-third-round-with-24-winners-to-polina-iatcenkos-3).

Sabalenka's early tournament play has consistently demonstrated her dominance. She showcased strong performance in the early stages, spending only two hours and 35 minutes on court across her first two rounds [[^]](https://www.usopen.org/en_US/news/articles/2026-09-04/how_aryna_sabalenka_finds_focus_amid_hype_and_noise_at_the_2026_us_open.html)[[^]](https://www.wtatennis.com/news/4571326/aryna-sabalenka-storms-into-us-open-third-round-with-24-winners-to-polina-iatcenkos-3)[[^]](https://www.facebook.com/TheFirstServeAU/posts/arynas-dominance-so-far-at-the-2026-us-open-matches-played-3games-won-36games-co/1394368079467250/). By progressing through the opening three rounds, she extended her remarkable US Open winning streak to 16 matches [[^]](https://www.wtatennis.com/news/4569739/sabalenka-starts-us-open-title-defense-with-straight-sets-win-over-osorio)[[^]](https://www.wtatennis.com/news/4572249/sabalenka-handles-early-armstrong-assignment-to-extend-us-open-win-streak-to-16)[[^]](https://www.wtatennis.com/news/4571326/aryna-sabalenka-storms-into-us-open-third-round-with-24-winners-to-polina-iatcenkos-3). Her victories included decisive wins against Camila Osorio (6-2, 6-4), qualifier Polina Iatcenko (6-1, 6-1), and Kamilla Rakhimova (6-3, 6-4) [[^]](https://www.wtatennis.com/news/4569739/sabalenka-starts-us-open-title-defense-with-straight-sets-win-over-osorio)[[^]](https://www.wtatennis.com/news/4571326/aryna-sabalenka-storms-into-us-open-third-round-with-24-winners-to-polina-iatcenkos-3). Despite displaying moments of frustration, Sabalenka has consistently dominated, reaching the round of 16 for the sixth consecutive year [[^]](https://www.wtatennis.com/news/4569739/sabalenka-starts-us-open-title-defense-with-straight-sets-win-over-osorio)[[^]](https://www.wtatennis.com/news/4572249/sabalenka-handles-early-armstrong-assignment-to-extend-us-open-win-streak-to-16).

## Based on the official 2026 US Open draw, which top seeds face the most challenging path to the later rounds?

Draw Balance | Unbalanced, bottom half most challenging [[^]](https://www.usopen.org/en_US/news/articles/2026-08-27/2026_us_open_womens_draw_sabalenka_pegula_and_noskova_in_top_half.html) |
Key Potential Matchup | Iga Świątek (No. 8) vs. Elena Rybakina (No. 2) in quarterfinals [[^]](https://www.wtatennis.com/news/4567752/us-open-draw-swiatek-faces-difficult-path-alongside-rybakina-osaka-and-keys) |
Sabalenka Win Probability | ~23% implied probability [[^]](https://www.usatoday.com/story/sports/tennis/open/2026/08/27/us-open-seeds-2026-mens-womens-singles-draw/91483416007/) |

**The 2026 US Open women's draw features an unbalanced, challenging bottom half**

The 2026 US Open women's draw features an unbalanced, challenging bottom half. The women's singles draw is widely considered unbalanced, with its bottom half presenting a notably challenging path for top seeds due to a concentration of strong contenders [[^]](https://www.usopen.org/en_US/news/articles/2026-08-27/2026_us_open_womens_draw_sabalenka_pegula_and_noskova_in_top_half.html). This demanding section of the draw includes significant threats such as Coco Gauff (No. 4), Mirra Andreeva (No. 5), Iga Świątek (No. 8), and Elena Rybakina (No. 2). Such a concentration of high-ranked players compels them to face each other earlier than those located in the top half [[^]](https://www.usopen.org/en_US/news/articles/2026-08-27/2026_us_open_womens_draw_sabalenka_pegula_and_noskova_in_top_half.html)[[^]](https://www.nytimes.com/athletic/7535408/2026/08/27/us-open-bracket-2026-analysis/).

The fourth quarter poses a significant challenge, notably for top seeds. Specifically, this section of the 2026 US Open women's singles draw presents a particularly challenging path for its top seeds [[^]](https://www.wtatennis.com/news/4567752/us-open-draw-swiatek-faces-difficult-path-alongside-rybakina-osaka-and-keys). This quarter is marked by a potential quarterfinal matchup between No. 8 seed Iga Świątek and No. 2 seed Elena Rybakina [[^]](https://www.wtatennis.com/news/4567752/us-open-draw-swiatek-faces-difficult-path-alongside-rybakina-osaka-and-keys). The difficulty is further exacerbated by the presence of other formidable players like Belinda Bencic, Naomi Osaka, and Madison Keys in this same quarter [[^]](https://www.wtatennis.com/news/4567752/us-open-draw-swiatek-faces-difficult-path-alongside-rybakina-osaka-and-keys).

Aryna Sabalenka is favored, but other top contenders face tougher routes. While Aryna Sabalenka (No. 1) is the betting favorite, holding an implied **probability** of approximately **23%** to win the tournament [[^]](https://www.usatoday.com/story/sports/tennis/open/2026/08/27/us-open-seeds-2026-mens-womens-singles-draw/91483416007/), other top contenders face more arduous routes. The paths for players such as Coco Gauff (with a **16%** implied **probability**) and Iga Świątek (with a **15%** implied **probability**) appear notably more difficult given the current draw's structure [[^]](https://news.kalshi.com/p/2026-us-open-womens-singles-odds-sabalenka-favored)[[^]](https://www.tennisabstract.com/current/2026USOpenWomenForecast.html).

## Which unseeded players or rising stars, such as Mirra Andreeva, pose the biggest upset threats to the top contenders in the 2026 US Open?

Unseeded upset victory | Kamilla Rakhimova defeated No. 27 seed Barbora Krejcikova [[^]](https://www.wtatennis.com/news/4569164/by-the-numbers-rakhimova-battles-through-marathon-final-game-to-upset-krejcikova) |
Former Top 10 unseeded threats | Paula Badosa, Daria Kasatkina [[^]](https://www.wtatennis.com/news/4567752/us-open-draw-swiatek-faces-difficult-path-alongside-rybakina-osaka-and-keys) |
Rising talents to watch | Iva Jovic, Linda Noskova, Alexandra Eala [[^]](https://www.oddsshopper.com/articles/prediction-markets/alexandra-eala-us-open-odds)[[^]](https://predictparity.com/markets/k/KXWTA-26USO-NOS/yes)[[^]](https://thebestpredictionmarkets.com/compare/us-open-women-s-singles-winner) |

**Several unseeded players pose significant upset threats at the 2026 US Open**

Several unseeded players pose significant upset threats at the 2026 US Open. Kamilla Rakhimova, Paula Badosa, and Daria Kasatkina have been explicitly identified as potential upsetters [[^]](https://www.wtatennis.com/news/4569164/by-the-numbers-rakhimova-battles-through-marathon-final-game-to-upset-krejcikova)[[^]](https://www.wtatennis.com/news/4567752/us-open-draw-swiatek-faces-difficult-path-alongside-rybakina-osaka-and-keys). Rakhimova notably defeated No. 27 seed Barbora Krejcikova in the first round [[^]](https://www.wtatennis.com/news/4569164/by-the-numbers-rakhimova-battles-through-marathon-final-game-to-upset-krejcikova). Former Top 10 players Badosa and Kasatkina, entering the tournament unseeded, are considered substantial threats within the competitive draw [[^]](https://www.wtatennis.com/news/4567752/us-open-draw-swiatek-faces-difficult-path-alongside-rybakina-osaka-and-keys). Other notable unseeded victories include Emma Navarro's upset of No. 7 seed Karolina Muchova [[^]](https://www.wtatennis.com/news/4572284/navarro-upsets-muchova-kostyuk-cruises-at-us-open), and Diana Shnaider, a 2026 Roland Garros semifinalist, who secured a victory over Karolina Pliskova in the second round [[^]](https://www.wtatennis.com/news/4571171/with-luck-on-her-side-paolini-joins-fernandez-and-shnaider-in-us-open-third-round).

Beyond unseeded contenders, several rising stars and young talents are garnering attention. Iva Jovic, Linda Noskova, and Alexandra Eala are highlighted as significant players to watch [[^]](https://www.oddsshopper.com/articles/prediction-markets/alexandra-eala-us-open-odds)[[^]](https://news.kalshi.com/p/2026-us-open-womens-singles-odds-sabalenka-favored)[[^]](https://predictparity.com/markets/k/KXWTA-26USO-NOS/yes)[[^]](https://thebestpredictionmarkets.com/compare/us-open-women-s-singles-winner). Alexandra Eala, seeded #17, shows considerable activity in prediction markets, indicating her as a player of interest [[^]](https://www.oddsshopper.com/articles/prediction-markets/alexandra-eala-us-open-odds). Marta Kostyuk and Amanda Anisimova, seeded #10, are also noted as threats in the draw [[^]](https://www.oddsshopper.com/articles/prediction-markets/alexandra-eala-us-open-odds)[[^]](https://news.kalshi.com/p/2026-us-open-womens-singles-odds-sabalenka-favored). Mirra Andreeva, despite being a rising star, is ranked as a top-10 player and seeded #5, positioning her as a top contender rather than an unseeded threat [[^]](https://news.kalshi.com/p/2026-us-open-womens-singles-odds-sabalenka-favored)[[^]](https://predictparity.com/markets/k/KXWTA-26USO-NOS/yes).

## How do Elena Rybakina and Qinwen Zheng compare in terms of Grand Slam experience and recent form on the North American hard-court swing?

Rybakina Grand Slam Titles | 2 (2022 Wimbledon, 2026 Australian Open) [[^]](https://www.wtatennis.com/players/324166/elena-rybakina/record) |
Zheng Grand Slam Finals | 1 (2024 Australian Open) [[^]](https://www.wtatennis.com/players/328120/qinwen-zheng/record) |
Rybakina 2026 Hard-Court Form | Semifinals (National Bank Open) [[^]](https://www.wtatennis.com/tournaments/806/montreal/2026/scores/LS015) |

**Elena Rybakina possesses significantly more Grand Slam experience and major titles**

Elena Rybakina possesses significantly more Grand Slam experience and major titles. She has secured two major championships, specifically Wimbledon in 2022 and the Australian Open in 2026, holding an impressive 2-1 record in Grand Slam finals within her 69-24 career record at majors [[^]](https://www.wtatennis.com/players/324166/elena-rybakina/record). As of September 5, 2026, Rybakina has advanced to the third round of the 2026 US Open and is actively contending for the world No. 1 ranking [[^]](https://www.usopen.org/en_US/news/articles/2026-09-03/rybakina_brushes_off_late_danger_for_2026_us_open_second-round_win.html). In contrast, Qinwen Zheng has a career record of 31-17 at Grand Slams, including one final appearance at the 2024 Australian Open and two quarterfinal finishes at the US Open in 2023 and 2024 [[^]](https://www.wtatennis.com/players/328120/qinwen-zheng/record). Zheng successfully qualified for the main draw of the 2026 US Open [[^]](https://www.facebook.com/groups/tennischanel/posts/3216272408575580/).

Rybakina shows strong recent form, while Zheng's activity has been limited. Entering the 2026 US Open, Elena Rybakina demonstrated strong recent form on the North American hard-court swing, having reached the semifinals of the National Bank Open in Toronto [[^]](https://www.wtatennis.com/tournaments/806/montreal/2026/scores/LS015). Conversely, Qinwen Zheng has had limited activity during the 2026 season, reflected by an 11-13 record and no recorded matches in the latter part of the summer, which significantly impacts her readiness for the tournament compared to Rybakina [[^]](https://www.wtatennis.com/players/328120/qinwen-zheng/matches).

## What Could Change the Odds

**The 2026 US Open Women's Singles tournament remains in progress, with the winner not yet determined as of September 5, 2026 [[^]](https://www.aljazeera.com/sports/2026/8/28/us-open-2026-all-to-know-about-the-schedule-top-seeds-and-favourites)[[^]](https://en.wikipedia.org/wiki/2026_US_Open_(tennis))[[^]](https://www.lta.org.uk/fan-zone/grand-slam/us-open/)[[^]](https://www.wtatennis.com/tournaments/905/us-open/2026)[[^]](https://www.wtatennis.com/news/4565225/us-open-2026-dates-draws-schedule-prize-money-and-everything-to-know).** **Market** sentiment in prediction platforms like Polymarket shifts dynamically with live match results and tournament progression [[^]](https://polymarket.com/event/2026-womens-us-open-winner-tennis). Aryna Sabalenka, the two-time defending champion and top seed, is currently competing in the main draw [[^]](https://en.wikipedia.org/wiki/2026_US_Open_%E2%**80%**93_Women%27s_singles)[[^]](https://www.usopen.org/en_US/draws/womens-singles.html)[[^]](https://www.espn.com/tennis/us-open/bracket/_/competitionType/2/season/2026)[[^]](https://www.wtatennis.com/news/4565225/us-open-2026-dates-draws-schedule-prize-money-and-everything-to-know)[[^]](https://www.wtatennis.com/news/4569739/sabalenka-starts-us-open-title-defense-with-straight-sets-win-over-osorio)[[^]](https://www.wtatennis.com/news/4540318/back-to-back-champion-aryna-sabalenka-tops-2026-us-open-entry-list).

**Upcoming tournament stages represent discrete catalysts for market activity.** The quarterfinals commence on September 8, followed by the women's semifinals on September 10, and the women's final scheduled for September 12, 2026 [[^]](https://www.aljazeera.com/sports/2026/8/28/us-open-2026-all-to-know-about-the-schedule-top-seeds-and-favourites). These events will directly impact the **probability** pricing for the eventual Women's Singles champion [[^]](https://polymarket.com/event/2026-womens-us-open-winner-tennis).

## Key Dates & Catalysts

- **Expiration:** September 27, 2026
- **Closes:** September 27, 2026

## Decision-Flipping Events

- The 2026 US Open Women's Singles tournament remains in progress, with the winner not yet determined as of September 5, 2026 [^] [^] [^] [^] [^] .
- **Market** sentiment in prediction platforms like Polymarket shifts dynamically with live match results and tournament progression [^] .
- Aryna Sabalenka, the two-time defending champion and top seed, is currently competing in the main draw [^] [^] [^] [^] [^] [^] .
- Upcoming tournament stages represent discrete catalysts for **market** activity.

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## Historical Resolutions

**Historical Resolutions:** 20 markets in this series

**Outcomes:** 1 resolved YES, 19 resolved NO

**Recent resolutions:**

- KXWTA-26-RAK: NO (Sep 04, 2026)
- KXWTA-26-SHN: NO (Sep 04, 2026)
- KXWTA-26-FER: NO (Sep 04, 2026)
- KXWTA-26MONTER-VID: NO (Aug 28, 2026)
- KXWTA-26MONTER-UDV: NO (Aug 27, 2026)

## Disclaimer

This content is for informational and educational purposes only and does not constitute financial, investment, legal, or trading advice.
Prediction markets involve risk of loss. Past performance does not guarantee future results.
We are not affiliated with Kalshi or any prediction market platform. Market data may be delayed or incomplete.

### Data Sources & Model Transparency

**Data Sources:** Octagon Deep Research aggregates information from multiple sources including news, filings, and market data.

**Freshness:** Analysis is generated periodically and may not reflect the latest developments. Verify critical information from primary sources.

**Partial model coverage:** Model probabilities were generated for 18 of 18 in-scope outcome(s). Outcomes outside the deterministic model scope show market prices only.

## Attribution Policy

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