The market strongly favors US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 1 O/U 8.5 at 100%. High confidence — but lower potential returns.
| # | Outcome | Probability | If Right | Volume |
|---|---|---|---|---|
| 1 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 1 O/U 8.5 | 100% | +0% | - |
| 2 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set Handicap +/-1.5 | 85% | +18% | - |
| 3 | Completed Match | 50% | +100% | - |
| 4 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 2 O/U 8.5 | 50% | +100% | - |
| 5 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Match O/U 21.5 | 50% | +100% | - |
| 6 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Total Sets: O/U 2.5 | 50% | +100% | - |
| 7 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 2 O/U 9.5 | 50% | +100% | - |
| 8 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Match O/U 23.5 | 50% | +100% | - |
| 9 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 2 O/U 10.5 | 50% | +100% | - |
| 10 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Game Spread +/-0.5 | 50% | +100% | - |
| 11 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Match O/U 22.5 | 32% | +208% | $86 |
| 12 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 2 Winner | 14% | +614% | - |
| 13 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas BEST VALUE | 7% | +1329% | $40K |
| 14 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set Handicap +/-1.5 | 4% | +2400% | - |
Real-money prediction market · Trade with confidence
This market refers to the tennis match between Elvina Kalieva and Sofia Costoulas in the US Open, Qualification WTA, originally scheduled for August 26, 2026 at 5:00PM ET. This market will resolve to...
This prediction market tracks whether US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas will occur, with $40K in total trading volume reflecting significant trader interest. Prediction markets aggregate the collective intelligence of participants who stake real money on outcomes, making them one of the most reliable forecasting tools available for events driven by team performance data, historical matchups, and real-time injury reports.
The market shows strong consensus: US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 1 O/U 8.5 is priced at 100%, indicating traders overwhelmingly expect this outcome. At this probability level, the potential return on a correct bet is relatively low, but contrarian positions carry significant upside if the consensus proves wrong.
Trading activity is exceptionally high, with $40K traded in the last 24 hours alone (100% of total volume). This surge often indicates breaking news, a key deadline approaching, or a significant shift in market sentiment.
This market is scheduled to resolve by 2026-09-02. As the resolution date approaches, expect increased trading activity and tighter probability estimates. Historical data shows that prediction market accuracy improves significantly in the final days before resolution.
As of Aug 26, 2026 at 23:55 UTC, the leading outcome is US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 1 O/U 8.5 at 100% probability, with $40K in total trading volume on Polymarket.
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