TOTAL VOLUME:

$116.8b

24H VOL:

$81,408,110

24H TRANSACTIONS:

1,362,287,844

OPEN INTEREST:

$1,158,719,757

338,335

Markets across

33,183

events

MATCHED EVENTS:

4,218

PLATFORM COVERAGE:

5

Polymarket:

42%

VS.

Kalshi:

58%

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2026 Women’s US Open Winner (Tennis)
Sports
limitless
predict
kalshi
polymarket

2026 Women’s US Open Winner (Tennis)

Total volume:
$8,179,873
Volume 24h:
$173,141
29%
Liquidity:
$1,442,854
9%
Open interest:
$792,651
10%

Aryna Sabalenka

all

4 markets

Kalshi

22%

Predict

23.3%

Limitless

21.6%

Polymarket

23%

consensus

22.5%

-3.4%

spread

21.6-23.3%

(1.8pp)

News

Positive

Negative

Neutral

Hover marker for details

Aug 20

Aug 21

Aug 22

Aug 23

Aug 24

Aug 26

Aug 27

Vol.

$29.7k

·

Resolves Sep 13, 2026

Time left: 17d:00h:05m

Will Aryna Sabalenka win the US Open Women's Singles?

22%chance
Amount

$

Trade on
kalshi

Trade on Kalshi

Join Kalshi and score $25 for your first trade.At 22¢ buys you 455 shares | Odds: 22% Total Payout: $455 | Net Profit: $355 Multiplier: 4.55x | ROI: 355% APY not meaningful 17 days to resolution
predict

Trade on Predict

At 23.3¢ buys you 429 shares | Odds: 22% Total Payout: $429 | Net Profit: $329 Multiplier: 4.29x | ROI: 329% APY not meaningful 16 days to resolution
limitless

Trade on Limitless

At 24.1¢ buys you 415 shares | Odds: 22% Total Payout: $415 | Net Profit: $315 Multiplier: 4.15x | ROI: 315% APY not meaningful 16 days to resolution
polymarket

Trade on Polymarket

At 23¢ buys you 435 shares | Odds: 22% Total Payout: $435 | Net Profit: $335 Multiplier: 4.35x | ROI: 335% APY not meaningful 16 days to resolution
You will be redirected to the platform to complete this trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
MUI X License key version mismatch
Total markets: 25 of 109

Description

This event group tracks predictions for the winner of the 2026 Women’s US Open tennis tournament. Markets across multiple platforms ask whether specific players will win the tournament, with consistent rules for resolving outcomes based on official tournament results.

PredictionHero - Resolution Divergence Alerts (RDA)

Unified Resolution Criteria (Consistent across platforms)

All platforms use the same resolution logic, referencing the official U.S. Open Women’s Singles winner and handling cancellations or delays uniformly.Primary resolution logic: Official information from the U.S. Open (https://www.usopen.org/index.html)

Core resolution logic:

  • The market resolves to the player who officially wins the 2026 U.S. Open Women’s Singles Tournament.
  • If the tournament is canceled, postponed after October 31, 2026, or no winner is declared by that date, markets resolve to "Other" or "No" as specified.
  • If a listed player becomes unable to compete and the tournament concludes, the market for that player resolves to "No".

Edge cases & clarifications:

  • Tournament Cancellation: If the tournament is canceled or no winner is declared by October 31, 2026, markets resolve to "Other" or "No" based on the market’s specific wording.
  • Player Disqualification: If a listed player is disqualified before the tournament concludes, the market for that player resolves to "No".
Timing: Resolution occurs after the official declaration of the tournament winner, no later than November 1, 2026, or immediately if the tournament is canceled or postponed beyond October 31, 2026.Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.
Show more

Polymarket

The 2026 U.S. Open tennis tournament is scheduled for August 23 - September 13, 2026. This market will resolve to the player that wins the 2026 U.S. Open Women’s Singles Tournament. If at any point it becomes impossible for a listed player to win the 2026 U.S. Open Women’s Singles Tournament per the rules of the tournament, the corresponding market will resolve to “No”. If the 2026 U.S. Open Women’s Singles Tournament is cancelled, postponed after October 31, 2026, or there is otherwise no winner declared within that timeframe, this market will resolve to “Other”. The primary resolution source will be official information from the U.S. Open (https://www.usopen.org/index.html); however, a consensus of credible reporting may also be used.

Kalshi

The 2026 US Open Women's Singles market resolves to Yes for whichever eligible participant wins the professional tennis tournament. If any participant forfeits, withdraws from consideration, or takes official action that removes them from being able to win the tournament, that participant's market resolves to No. Only one participant can win the tournament and resolve to Yes.

Predict

The 2026 U.S. Open tennis tournament is scheduled for August 23 - September 13, 2026. This market will resolve to the player that wins the 2026 U.S. Open Women’s Singles Tournament. If at any point it becomes impossible for a listed player to win the 2026 U.S. Open Women’s Singles Tournament per the rules of the tournament, the corresponding market will resolve to “No”. If the 2026 U.S. Open Women’s Singles Tournament is cancelled, postponed after October 31, 2026, or there is otherwise no winner declared within that timeframe, this market will resolve to “Other”. The primary resolution source will be official information from the U.S. Open (https://www.usopen.org/index.html); however, a consensus of credible reporting may also be used.

Limitless

The 2026 U.S. Open tennis tournament is scheduled for August 23 - September 13, 2026. This market will resolve to the player that wins the 2026 U.S. Open Women’s Singles Tournament. If at any point it becomes impossible for a listed player to win the 2026 U.S. Open Women’s Singles Tournament per the rules of the tournament, the corresponding market will resolve to “No”. If the 2026 U.S. Open Women’s Singles Tournament is cancelled, postponed after October 31, 2026, or there is otherwise no winner declared within that timeframe, this market will resolve to “Other”. The primary resolution source will be official information from the U.S. Open (https://www.usopen.org/index.html); however, a consensus of credible reporting may also be used.

Frequently asked questions

The dashboard for the 2026 Women’s US Open tennis market shows aggregated predictions across platforms like Polymarket and Kalshi. It displays the current consensus view, total volume of $7,630,564, and 24-hour volume of $59,685, helping users monitor how traders price the chances of different players winning the tournament.

Prediction market odds on this market often differ from traditional sportsbook lines due to unique trader dynamics and liquidity conditions. While sportsbooks may set broader lines to manage risk, prediction markets reflect real-time sentiment and can show sharper shifts based on trading volume and public interest. The spread between the two can be around 0.5, influenced by factors like recent player performance and betting patterns.

On Polymarket and Kalshi, prices can vary because of differences in user base, liquidity, and market design. Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. For example, Polymarket currently favors Will Aryna Sabalenka win the US Open Women's Singles? at 21.5%, while Kalshi leans toward Will Aryna Sabalenka win the US Open Women's Singles? at 22.0%. These discrepancies arise from varying levels of participation, regional interest, and how each platform handles order matching and fee structures.

This market resolves around Sep 13, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The winner is determined by official tournament results, and all platforms will settle based on that final declaration. Timing aligns with the last day of competition, ensuring a clear and transparent close.

Key signals that could shift this market include major tournaments, player injuries, ranking changes, and head-to-head match outcomes leading up to the event. Media narratives, coaching changes, and even weather conditions at the venue can also influence trader sentiment. Any development affecting a top contender’s form or availability may cause rapid re-pricing across platforms.