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| Outcome | Chance | 24h | 1 week | Bid · Ask | 24h volume | Ends |
|---|---|---|---|---|---|---|
| US Open WTA: Kimberly Birrell vs Petra Marcinko | 100% | +48 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| Completed Match | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Set 2 Winner | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Set Handicap +/-1.5 | 0% | −30 pts | — | — · 2¢ | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Set 1 Winner | 0% | −49 pts | — | — · <1¢ | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Match O/U 21.5 | 100% | +49 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Set 1 O/U 8.5 | 100% | +39 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Set 1 O/U 9.5 | 0% | −46 pts | — | — · <1¢ | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Match O/U 23.5 | 100% | +58 pts | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Match O/U 22.5 | 100% | +56 pts | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Total Sets: O/U 2.5 | 100% | +60 pts | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Set 2 O/U 8.5 | 100% | +50 pts | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Game Spread +/-1.5 | 0% | −47 pts | — | — · <1¢ | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Set 2 O/U 9.5 | 100% | +50 pts | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Set 2 O/U 10.5 | 100% | +50 pts | — | 99¢ · 100¢ (1¢) | — | ended |
| US Open WTA: Kimberly Birrell vs Petra Marcinko Set 1 O/U 10.5 | 0% | −35 pts | — | — · <1¢ | — | ended |
| When | Trader | Outcome | Bet | Size | P&L now | Insider |
|---|---|---|---|---|---|---|
| 53d |  alpheclabs | US Open WTA: Kimberly Birrell vs Petra Marcinko | SellKimberly Birrell>99¢ | $1,423 | −$1 −0.1% | — |
| 53d | NS13 | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko9¢ → 0¢ | $1,112 | −$1,112 −100% | 6 |
| 53d | neutralwave23 | US Open WTA: Kimberly Birrell vs Petra Marcinko | SellKimberly Birrell86¢ → 100¢ | $1,119 | −$182 −16% | — |
| 53d | Flaznorp | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko48¢ → 0¢ | $1,500 | −$1,500 −100% | 6 |
| 53d | ferrariChampions20262 fills | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyKimberly Birrell44¢ → 100¢ | $9,585 | +$12,383 +129% | 6 |
| 53d |  RN1 | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyKimberly Birrell36¢ → 100¢ | $3,708 | +$6,592 +178% | 6 |
| 53d | HomeRunHazard2 fills | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyKimberly Birrell36¢ → 100¢ | $5,086 | +$9,042 +178% | 6 |
| 53d | HomeRunHazard3 fills | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko69¢ → 0¢ | $13,847 | −$13,847 −100% | 6 |
| 53d | omnibus-076daa | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko76¢ → 0¢ | $1,483 | −$1,483 −100% | 6 |
| 54d | HVAB6 fills | US Open WTA: Kimberly Birrell vs Petra Marcinko | SellPetra Marcinko69¢ → 0¢ | $20,503 | +$20,503 +100% | — |
| 54d | Yawning-Chicken | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko74¢ → 0¢ | $1,493 | −$1,493 −100% | 6 |
| 54d | curie | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko74¢ → 0¢ | $1,258 | −$1,258 −100% | 6 |
| 54d | HVAB2 fills | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyKimberly Birrell36¢ → 100¢ | $6,668 | +$11,694 +175% | 6 |
| 54d | fortuneking | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko74¢ → 0¢ | $1,036 | −$1,036 −100% | 6 |
| 54d | Witty-Matrix-NumismatistNew account | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko82¢ → 0¢ | $1,255 | −$1,255 −100% | 11 |
| 54d | KOGamble6273 | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko83¢ → 0¢ | $1,180 | −$1,180 −100% | 5 |
| 54d | HVAB4 fills | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko80¢ → 0¢ | $43,343 | −$43,343 −100% | 5 |
| 54d | HVAB | US Open WTA: Kimberly Birrell vs Petra Marcinko | SellKimberly Birrell19¢ → 100¢ | $2,375 | −$10,126 −426% | — |
| 54d |  tradecraft | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko52¢ → 0¢ | $1,226 | −$1,226 −100% | 6 |
| 54d | flatbarrel | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko49¢ → 0¢ | $1,098 | −$1,098 −100% | 6 |
| 54d |  TRCM | US Open WTA: Kimberly Birrell vs Petra Marcinko | BuyPetra Marcinko49¢ → 0¢ | $4,407 | −$4,407 −100% | 6 |
This market refers to the tennis match between Kimberly Birrell and Petra Marcinko in the US Open WTA, originally scheduled for August 30, 2026 at 11:00AM ET. This market will resolve to 'Kimberly Birrell' if Kimberly Birrell advances against Petra Marcinko. This market will resolve to 'Petra Marcinko' if Petra Marcinko advances against Kimberly Birrell. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by September 13, 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 WTA: Kimberly Birrell vs Petra Marcinko means the market gives it about 100%.