TOTAL VOLUME:

$134.2b

24H VOL:

$134,145,987

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,441,166,947

406,422

Markets across

30,383

events

MATCHED EVENTS:

2,688

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova
polymarket
opinion
limitless
kalshi

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova

Volume:
$882,986

Katerina Siniakova

 - Kalshi

Katerina Siniakova - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Sep 1, 2026

Closed: Aug 31, 7:55 PM EST

kalshi

Kalshi

View
Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Katerina Siniakova

View
100%
35%
Yes 100¢No 0¢
1¢
N/A
$441,557
N/A
N/A
$301,685
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Set 1 O/U 8.5

View
100%
34%
Yes 100¢No 0¢
1¢
N/A
$23
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Game Spread +/-3.5

View
100%
Yes 100¢No 0¢
—
N/A
$5
N/A
N/A
N/A
Settled
Yes
kalshi

Elisabetta Cocciaretto

View
0%
37%
Yes 0¢No 100¢
1¢
N/A
$407,237
N/A
N/A
$236,489
Settled
No
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova

View
0%
37%
Yes 0¢No 100¢
—
N/A
$32,068
N/A
N/A
N/A
Settled
Yes
limitless

Elisabetta Cocciaretto vs Katerina Siniakova

View
0%
Yes 0¢No 100¢
99.8¢
N/A
$1,000
N/A
N/A
N/A
Settled
No
opinion

Elisabetta Cocciaretto vs Katerina Siniakova

View
N/A
N/A
—
N/A
N/A
N/A
N/A
N/A
Settled
No
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Match O/U 21.5

View
0%
Yes 0¢No 100¢
—
N/A
$556
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Total Sets: O/U 2.5

View
0%
10%
Yes 0¢No 100¢
20¢
N/A
$507
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Set 2 Winner

View
0%
2%
Yes 0¢No 100¢
6¢
N/A
$32
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Set 1 Winner

View
0%
Yes 0¢No 100¢
—
N/A
$1
N/A
N/A
N/A
Settled
Yes
polymarket

Completed Match

View
100%
Yes 100¢No 0¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Set 2 O/U 8.5

View
0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Set Handicap +/-1.5

View
100%
23%
Yes 100¢No 0¢
12¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Set 2 O/U 9.5

View
0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Set 1 O/U 9.5

View
0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Match O/U 22.5

View
0%
55%
Yes 0¢No 100¢
73¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Set 2 O/U 10.5

View
0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Set 1 O/U 10.5

View
0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

US Open WTA: Elisabetta Cocciaretto vs Katerina Siniakova Match O/U 23.5

View
0%
50%
Yes 0¢No 100¢
73¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
Total markets: 20

Intro

This market tracks who will win the US Open WTA tennis match between Elisabetta Cocciaretto and Katerina Siniakova. The aggregated consensus probability for Cocciaretto to win is 10.0%. Data comes from Polymarket, Opinion, Limitless, and Kalshi, with resolution based on the official WTA Tour scoring page. Watch for the match result on August 30, 2026, which will determine the outcome.

PredictionHero - Resolution Divergence Alerts (RDA)

Unified Resolution Criteria (Consistent across platforms)

All platforms agree on using the official WTA Tour result, with consistent handling of retirements, defaults, disqualifications, and walkovers.Primary resolution logic: Official WTA Tour scoring page

Core resolution logic:

  • The market resolves to the player who wins the match as officially determined by the WTA Tour.
  • If the match is canceled before any play or remains unresolved beyond the 14-day window, it resolves 50-50.
  • Retirements, defaults, or disqualifications result in the opposing player being declared the winner unless the match was canceled before any play.

Edge cases & clarifications:

  • Retirement/Default: If a player retires, defaults, or is disqualified during the match, the opposing player is declared the winner.
  • Walkover: If a player withdraws before the match starts, the market resolves 50-50.
  • Match Not Completed: If the match begins but is not completed (e.g., due to injury, weather, or other interruptions) and no winner is determined, the market resolves 50-50.
Timing: Resolution occurs when the official WTA Tour result is published, typically within 24 hours of match completion, but no later than September 13, 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.

Polymarket

This market refers to the tennis match between Elisabetta Cocciaretto and Katerina Siniakova in the US Open WTA, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve to 'Elisabetta Cocciaretto' if Elisabetta Cocciaretto advances against Katerina Siniakova. This market will resolve to 'Katerina Siniakova' if Katerina Siniakova advances against Elisabetta Cocciaretto. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 13, 2026, 11:59 PM ET (14 days after the scheduled start), this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.

Kalshi

Markets resolve to Yes if the specified player wins the Cocciaretto vs Siniakova professional tennis match in the 2026 US Open Women Singles Round Of 128 after a ball has been played. If the match does not occur due to injury, walkover, forfeiture, or cancellation before play begins, the market resolves to a fair price. Postponements or delays keep the market open until the rescheduled match concludes within two weeks.

Limitless

This market refers to the tennis match between Elisabetta Cocciaretto and Katerina Siniakova in the WTA US Open, originally scheduled for August 30, 2026 at 15:00 UTC. This market will resolve to 'Elisabetta Cocciaretto' if Elisabetta Cocciaretto advances against Katerina Siniakova. This market will resolve to 'Katerina Siniakova' if Katerina Siniakova advances against Elisabetta Cocciaretto. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50.

Opinion

In the upcoming WTA singles match scheduled for 2026-08-31 22:55 UTC: if Elisabetta Cocciaretto wins the match, this market resolves to "Elisabetta Cocciaretto"; if Katerina Siniakova wins, it resolves to "Katerina Siniakova". The winner is the first player to claim the required number of sets under the match's official best-of format. If the match begins but is not completed, a retirement or default counts the opposing player as the winner. If a walkover is declared before the first point is played, the match is outright canceled, or it is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. Suspensions caused by weather, fading light, or other tournament-imposed delays do not close this market — it stays open until the match is officially completed, provided it concludes within the 7-day window mentioned above. Resolution Source: The official WTA Tour scoring page. Note: This market will resolve strictly based on the first officially published result from the designated source. Any subsequent revisions will not affect this resolution.

Frequently asked questions

The dashboard for the US Open WTA Cocciaretto vs Siniakova match market aggregates real-time data from multiple platforms, showing how traders price the likelihood of each outcome. It displays cumulative volume of $882,986 and recent 24-hour volume of $880,073, letting you see consensus views across venues. This centralized view helps you spot trends and compare sentiment without checking each platform individually.

Prediction market odds on this market often reflect sharper, more granular insights than traditional sportsbook lines because they incorporate real-time trader sentiment and can adjust minute-by-minute. While sportsbooks may lag or smooth volatility, prediction markets let participants express nuanced expectations, sometimes showing wider or tighter spreads depending on recent form and betting patterns. The gap between the two can also highlight where public or expert sentiment diverges.

Key signals that could shift this market include player injuries, recent match performances, weather conditions on tournament day, and any last-minute seeding changes. Media commentary and betting volume spikes also often precede price adjustments. Traders will watch practice updates and head-to-head statistics, as well as any unexpected disruptions that might affect on-court performance as the event approaches.