Analytics
Trading is closed with the Kayla Day side last at 50%; no result has been reported.
$79.09K has traded since listing.
The largest Kayla Day position is dehneyyyy with 2K shares; the largest Kimberly Birrell position is Trader76 with 6.
Polymarket record as of Oct 20, 7:21 PM UTC
Daily closes of the Kayla Day price, Polymarket CLOB, 1 point, 20 Oct 2026, chart shows 30%–45%
| Observed | Kayla Day price |
|---|---|
| 20 Oct 2026 | 38.5% |
The ten largest positions on Polymarket's public holder list.
| Trader | Outcome | Shares |
|---|---|---|
| dehneyyyy | Kayla Day | 2K |
| rplc-ftbl | Kayla Day | 600.06 |
| Trader76 | Kimberly Birrell | 6.45 |
| AntonioTocino | Kimberly Birrell | 5.88 |
Every wallet's public record, and 80,000 ranked by lifetime P&L: Polymarket leaderboard
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.
Official listing: polymarket.com/event/wta-day-birrell-2026-10-20
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