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| Outcome | Chance | 24h | 1 week | Bid · Ask | 24h volume | Ends |
|---|---|---|---|---|---|---|
| Japan Women's Open: Kayla Day vs Kimberly Birrell | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set Handicap +/-1.5 | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Total Sets: O/U 2.5 | 50% | — | — | 50¢ · 51¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set 1 O/U 8.5 | 50% | — | — | 50¢ · 51¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set 1 Winner | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Match O/U 22.5 | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set 1 O/U 10.5 | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Match O/U 23.5 | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set Handicap +/-1.5 | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Game Spread +/-3.5 | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set 2 Winner | 50% | — | — | 50¢ · 51¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Match O/U 21.5 | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Completed Match | 0% | — | — | — · <1¢ | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set 1 O/U 9.5 | 50% | — | — | 50¢ · 51¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set 2 O/U 8.5 | 50% | — | — | 49¢ · 50¢ (1¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set 2 O/U 9.5 | 50% | — | — | 49¢ · 51¢ (2¢) | — | in 3d |
| Japan Women's Open: Kayla Day vs Kimberly Birrell Set 2 O/U 10.5 | 50% | — | — | 50¢ · 51¢ (1¢) | — | in 3d |
| When | Trader | Outcome | Bet | Size | P&L now | Insider |
|---|---|---|---|---|---|---|
| 4d | dehneyyyy | Japan Women's Open: Kayla Day vs Kimberly Birrell | BuyKayla Day50¢ | $1,000 | $0 0.0% | 4 |
| 4d | tasty-a2 fills | Japan Women's Open: Kayla Day vs Kimberly Birrell | BuyKimberly Birrell51¢ → 50¢ | $2,662 | −$52 −2.0% | 4 |
| 4d | Fitting-Pickle2 fills | Japan Women's Open: Kayla Day vs Kimberly Birrell | BuyKimberly Birrell51¢ → 50¢ | $2,998 | −$59 −2.0% | 4 |
| 4d | Fitting-Pickle | Japan Women's Open: Kayla Day vs Kimberly Birrell Set Handicap +/-1.5 | BuyKayla Day51¢ → 50¢ | $1,177 | −$23 −2.0% | 4 |
| 4d | Beasts2 fills | Japan Women's Open: Kayla Day vs Kimberly Birrell | BuyKayla Day42¢ → 50¢ | $8,502 | +$1,552 +18% | 4 |
| 4d |  RollAwayTheDew | Japan Women's Open: Kayla Day vs Kimberly Birrell | BuyKimberly Birrell57¢ → 50¢ | $1,501 | −$184 −12% | 4 |
This market refers to the tennis match between Kayla Day and Kimberly Birrell in the Japan Women's Open, originally scheduled for October 20, 2026 at 1:30AM ET. This market will resolve to 'Kayla Day' if Kayla Day advances against Kimberly Birrell. This market will resolve to 'Kimberly Birrell' if Kimberly Birrell advances against Kayla Day. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 3, 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.
Sources: Polymarket's Gamma API, its CLOB price history and its Data API, read every two minutes. Prices are each outcome's Yes price, which is the market's probability: 50¢ for Japan Women's Open: Kayla Day vs Kimberly Birrell means the market gives it about 50%.