About This Market
Sayaka Ishii vs.
Sayaka Ishii vs. Mary Stoiana: WTA Tennis match held on 2026-10-18. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction.com.
Sayaka Ishii vs. Mary Stoiana
Sayaka Ishii vs. Mary Stoiana
Live prediction market odds for Sayaka Ishii vs. Mary Stoiana. Compare prices across .
WTA Listed Resolved
This market resolved on Oct 18, 2026. Mary Stoiana was the officially declared outcome.
Sayaka Ishii vs.
Sayaka Ishii vs. Mary Stoiana: WTA Tennis match held on 2026-10-18. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction.com.
| Question | Result |
|---|---|
Mary StoianaWINNER | Yes |
Sayaka Ishii | No |
Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket.
KalshiIf Mary Stoiana wins the Stoiana vs Ishii professional tennis match in the 2026 WTA Osaka Qualification Final after a ball has been played, then the market resolves to Yes.
The following market refers to the Stoiana vs Ishii professional tennis match in the 2026 WTA Osaka Qualification Final 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.
PolymarketThis market refers to the tennis match between Mary Stoiana and Sayaka Ishii in the Japan Women's Open, Qualification, originally scheduled for October 17, 2026 at 10:30PM ET. This market will resolve to 'Mary Stoiana' if Mary Stoiana advances against Sayaka Ishii. This market will resolve to 'Sayaka Ishii' if Sayaka Ishii advances against Mary Stoiana. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 31, 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.
The outcomes listed above show how traders are pricing this question. Venue prices are not currently available on this page. Each price reflects the market’s implied probability, not a guaranteed result. This event is archived; prices shown are historical.
No historical prices are available on this page. The last available price is not necessarily the final settlement price.
Venues have different traders, liquidity and fees, so their prices can differ. A cross-platform comparison needs available prices for the same outcome on at least two venues.
For example, a 40¢ price implies about a 40% 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.