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MARKET RESOLVEDKalshi / Polymarket

Stefanos Tsitsipas Wins: Yoshihito Nishioka vs. Stefanos Tsitsipas

ATP·Resolved 2026-09-28

This market resolved on 2026-09-28. Stefanos Tsitsipas was the officially declared outcome. Prior to resolution, the market peaked at 99%.

About This Market

Yoshihito Nishioka vs.

Yoshihito Nishioka vs. Stefanos Tsitsipas: ATP Tennis match held on 2026-09-28. 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 Stefanos Tsitsipas wins the Tsitsipas vs Nishioka professional tennis match in the 2026 ATP Tokyo Qualification Round 1 after a ball has been played, then the market resolves to Yes.

Edge Cases

The following market refers to the Tsitsipas vs Nishioka professional tennis match in the 2026 ATP Tokyo Qualification Round 1 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 Stefanos Tsitsipas and Yoshihito Nishioka in the Japan Open Tennis Championships, Qualification, originally scheduled for September 27, 2026 at 10:00PM ET. This market will resolve to 'Stefanos Tsitsipas' if Stefanos Tsitsipas advances against Yoshihito Nishioka. This market will resolve to 'Yoshihito Nishioka' if Yoshihito Nishioka advances against Stefanos Tsitsipas. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 11, 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 ATP Tour. A consensus of credible reporting may also be used.

Resolution Oracles

UMA Optimistic OracleConsensus of Sources

Frequently Asked Questions

What does the Yoshihito Nishioka vs. Stefanos Tsitsipas 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 Yoshihito Nishioka vs. Stefanos Tsitsipas odds?

The last available prices are Stefanos Tsitsipas: 99.0¢ on Kalshi, 99.9¢ on Polymarket; Yoshihito Nishioka: 13.0¢ 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 Yoshihito Nishioka vs. Stefanos Tsitsipas odds vary across prediction markets?

The largest price difference shown across venues is 12.9 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 Yoshihito Nishioka vs. Stefanos Tsitsipas prediction market payouts work?

For example, Stefanos Tsitsipas at 99.5¢ implies about a 99.5% 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.

Candidate
Stefanos TsitsipasWINNER	99%	100%
Yoshihito Nishioka	13%	0%

Stefanos Tsitsipas Wins: Yoshihito Nishioka vs. Stefanos Tsitsipas

About This Market

Price History

Stefanos Tsitsipas Wins: Yoshihito Nishioka vs. Stefanos Tsitsipas

About This Market

Price History

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Final Closing Odds

Resolution Oracles

Frequently Asked Questions

Stefanos Tsitsipas Wins: Yoshihito Nishioka vs. Stefanos Tsitsipas

About This Market

Price History

Stefanos Tsitsipas Wins: Yoshihito Nishioka vs. Stefanos Tsitsipas

About This Market

Price History

Related Markets

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Bai Zhuoxuan vs. Jiayi Wang

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Final Closing Odds

Resolution Oracles

Market Rulebook: Yoshihito Nishioka vs. Stefanos Tsitsipas

Frequently Asked Questions