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| Outcome | Chance | 24h | 1 week | Bid · Ask | 24h volume | Ends |
|---|---|---|---|---|---|---|
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | 100% | — | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Match O/U 22.5 | 100% | — | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 2 Winner | 100% | — | — | >99¢ · 100¢ (<1¢) | — | ended |
| Completed Match | 100% | — | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 1 Winner | 0% | — | — | — · <1¢ | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 2 O/U 8.5 | 100% | — | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Match O/U 21.5 | 100% | — | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 1 O/U 8.5 | 100% | — | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Total Sets: O/U 2.5 | 100% | — | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 2 O/U 9.5 | 0% | — | — | — · <1¢ | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 1 O/U 9.5 | 0% | — | — | — · <1¢ | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Match O/U 23.5 | 100% | — | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 2 O/U 10.5 | 0% | — | — | — · <1¢ | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set 1 O/U 10.5 | 0% | — | — | — · <1¢ | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set Handicap +/-1.5 | 0% | — | — | — · 8¢ | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Set Handicap +/-1.5 | 0% | — | — | — · 1¢ | — | ended |
| US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas Game Spread +/-0.5 | 100% | — | — | >99¢ · 100¢ (<1¢) | — | ended |
| When | Trader | Outcome | Bet | Size | P&L now | Insider |
|---|---|---|---|---|---|---|
| 58d |  hd777 | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | BuyElvina Kalieva98¢ → 100¢ | $6,854 | +$129 +1.9% | 4 |
| 58d | Flaznorp | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | BuyElvina Kalieva97¢ → 100¢ | $1,135 | +$35 +3.1% | 4 |
| 58d |  MurkSniper | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | BuyElvina Kalieva81¢ → 100¢ | $1,343 | +$315 +23% | 5 |
| 58d | kapper-betka | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | BuyElvina Kalieva71¢ → 100¢ | $3,553 | +$1,472 +41% | 6 |
| 59d | DAKWIN2 fills | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | SellSofia Costoulas74¢ → 0¢ | $4,064 | +$4,064 +100% | — |
| 59d |  tradecraft | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | BuyElvina Kalieva50¢ → 100¢ | $1,180 | +$1,173 +99% | 6 |
| 59d | flatbarrel | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | BuyElvina Kalieva50¢ → 100¢ | $2,496 | +$2,504 +100% | 6 |
| 59d | omnibus-076daa | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | BuyElvina Kalieva50¢ → 100¢ | $2,449 | +$2,449 +100% | 6 |
| 59d | RaulRosasJr | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | BuySofia Costoulas51¢ → 0¢ | $2,831 | −$2,831 −100% | 6 |
| 59d | DAKWIN | US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas | BuySofia Costoulas50¢ → 0¢ | $2,417 | −$2,417 −100% | 6 |
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 'Elvina Kalieva' if Elvina Kalieva advances against Sofia Costoulas. This market will resolve to 'Sofia Costoulas' if Sofia Costoulas advances against Elvina Kalieva. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 9, 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: 100¢ for US Open, Qualification WTA: Elvina Kalieva vs Sofia Costoulas means the market gives it about 100%.