About This Market
Kayla Day vs.
Kayla Day vs. Ena Koike: WTA Tennis match held on 2026-10-17. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction.com.
Kayla Day vs. Ena Koike
Live prediction market odds for Kayla Day vs. Ena Koike. Compare prices across .
This market resolved on Oct 17, 2026. Kayla Day was the officially declared outcome.
Kayla Day vs.
Kayla Day vs. Ena Koike: WTA Tennis match held on 2026-10-17. Review the historical prediction market odds from Kalshi, Polymarket, and more on Prediction.com.
| Question | Result |
|---|---|
Kayla DayWINNER | Yes |
Ena Koike | No |
Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket.
KalshiIf Ena Koike wins the Koike vs Day professional tennis match in the 2026 WTA Osaka Qualification Round 1 after a ball has been played, then the market resolves to Yes.
The following market refers to the Koike vs Day professional tennis match in the 2026 WTA Osaka 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.
PolymarketThis market refers to the tennis match between Ena Koike and Kayla Day in the Japan Women's Open, Qualification, originally scheduled for October 16, 2026 at 10:30PM ET. This market will resolve to 'Ena Koike' if Ena Koike advances against Kayla Day. This market will resolve to 'Kayla Day' if Kayla Day advances against Ena Koike. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by October 30, 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.
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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.