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MARKET RESOLVEDKalshi / Polymarket

Coco Gauff Wins: Marta Kostyuk vs. Coco Gauff

WTA·Resolved 2026-08-22

This market resolved on 2026-08-22. Coco Gauff was the officially declared outcome. Prior to resolution, the market peaked at 100%.

About This Market

Marta Kostyuk vs.

Marta Kostyuk vs. Coco Gauff — WTA Tennis match held on 2026-08-22. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction Hunt.

Price History

Multi-Platform Probabilities

Learn more:How to Read Prediction Market Prices Compare Fees Before You Trade New to Polymarket?

Market RulebooksOfficial settlement criteria and edge cases

Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket.

Rules for Candidate:

Kalshi

Primary Rule

If Coco Gauff wins the Gauff vs Kostyuk professional tennis match in the 2026 WTA Cincinnati Quarterfinal after a ball has been played, then the market resolves to Yes.

Edge Cases

The following market refers to the Gauff vs Kostyuk professional tennis match in the 2026 WTA Cincinnati Quarterfinal after a ball has been played. If the match does not occur (signaled by a ball being played) due to a player injury, walkover, forfeiture, or any other cancellation (all before the match starts), the market will resolve to a fair price in accordance with the rules. If this match is postponed or delayed, the market will remain open and close after the rescheduled match has finished (within two weeks). Kalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.

Resolution Oracles

Kalshi Rules

Polymarket

Primary Rule

This market refers to the tennis match between Coco Gauff and Marta Kostyuk in the Cincinnati Open, originally scheduled for August 21, 2026 at 11:00AM ET. This market will resolve to 'Coco Gauff' if Coco Gauff advances against Marta Kostyuk. This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Coco Gauff. 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. The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.

Resolution Oracles

UMA Optimistic OracleConsensus of Sources

Frequently Asked Questions

What does the Marta Kostyuk vs. Coco Gauff prediction market track?

The outcomes listed above show how traders are pricing this question. Compare outcome prices from Kalshi, Polymarket in one place. Each price reflects the market’s implied probability, not a guaranteed result. This event is archived; prices shown are historical.

What were the last available Marta Kostyuk vs. Coco Gauff odds?

The last available prices are Coco Gauff: 99.5¢ on Kalshi, 99.9¢ on Polymarket; Marta Kostyuk: 0.5¢ on Kalshi, 0.1¢ on Polymarket. Prices are quoted in cents per $1 share. Check the venue for executable prices and available liquidity. The last available price is not necessarily the final settlement price.

Why do Marta Kostyuk vs. Coco Gauff odds vary across prediction markets?

The largest price difference shown across venues is 0.4 percentage points. Venues have different traders, liquidity and fees, so their prices can differ. A price gap alone does not establish an executable arbitrage opportunity; compare settlement rules and the actual buy and sell prices.

How do Marta Kostyuk vs. Coco Gauff prediction market payouts work?

For example, Coco Gauff at 99.7¢ implies about a 99.7% chance. For a standard $1 contract, a share pays $1 if its outcome settles as correct and $0 if it settles as incorrect. A winning share bought at 40¢ earns 60¢ before fees. Check each venue’s settlement rules, fees and eligibility before trading. Historical prices alone do not identify the winning outcome.

Coco Gauff Wins: Marta Kostyuk vs. Coco Gauff

About This Market

Price History

Coco Gauff Wins: Marta Kostyuk vs. Coco Gauff

About This Market

Price History

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Final Closing Odds

Resolution Oracles

Frequently Asked Questions

Candidate
Coco GauffWINNER	100%	100%
Marta Kostyuk	1%	0%

Coco Gauff Wins: Marta Kostyuk vs. Coco Gauff

About This Market

Price History

Coco Gauff Wins: Marta Kostyuk vs. Coco Gauff

About This Market

Price History

Related Markets

South Florida Bulls vs. UTSA Roadrunners

Katie Swan vs. Reese Brantmeier

Offensive Player of the Year Winner?

Southeast Missouri State Redhawks vs. Lindenwood Lions

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South Florida Bulls vs. UTSA Roadrunners

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Final Closing Odds

Resolution Oracles

Market Rulebook: Marta Kostyuk vs. Coco Gauff

Frequently Asked Questions