Analytics
Resolved Guo/Mladenovic on 20 Aug 2026.
The last daily price before settlement had Guo/Mladenovic at 57.5%. The Kostyuk/Stearns side opened at 34% on 19 Aug 2026. Before it settled, the high was 42.5% on 20 Aug 2026 and the low 34% on 19 Aug 2026. Its largest one-day move was 8.5 points up, to 42.5% on 20 Aug 2026. $975.89 traded over the market's life.
10 wallets still hold shares. Winners redeem theirs after settlement, so what is left is mostly the losing side.
Polymarket record as of Aug 21, 12:31 AM UTC
Daily closes of the Kostyuk/Stearns price, Polymarket CLOB, 2 points, 19 Aug 2026 – 20 Aug 2026, chart shows 30%–45%
| Observed | Kostyuk/Stearns price |
|---|---|
| 19 Aug 2026 | 34.0% |
| 20 Aug 2026 | 42.5% |
Winners have redeemed their shares, so most of what is left is the losing side.
| Trader | Outcome | Shares |
|---|---|---|
| earthisgood | Kostyuk/Stearns | 189.04 |
| Dreyk | Kostyuk/Stearns | 39.22 |
| VitMo | Kostyuk/Stearns | 25 |
| Tomdo | Kostyuk/Stearns | 14.35 |
Every wallet's public record, and 80,000 ranked by lifetime P&L: Polymarket leaderboard
This market refers to the doubles tennis match between Kostyuk/Stearns and Guo/Mladenovic in the Cincinnati Open, originally scheduled for August 19, 2026 at 10:00AM ET. This market will resolve to 'Kostyuk/Stearns' if the team of Kostyuk/Stearns advances against Guo/Mladenovic. This market will resolve to 'Guo/Mladenovic' if the team of Guo/Mladenovic advances against Kostyuk/Stearns. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. If the match begins but is not completed, and one team advances due to the opponent's retirement, default, or disqualification, this market will resolve to the team who advances. If the match ends in a walkover (a team 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-doubles-kostste-guomlad-2026-08-19
| LaoNiuBiLe | Kostyuk/Stearns | 10 |
| locatedMMM | Kostyuk/Stearns | 10 |
| aruqueen | Kostyuk/Stearns | 5 |
| TennisUnder | Kostyuk/Stearns | 5 |
| triklozoid | Kostyuk/Stearns | 5 |
| PT-S5 | Kostyuk/Stearns | 5 |
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