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| Outcome | Chance | 24h | 1 week | Bid · Ask | 24h volume | Ends |
|---|---|---|---|---|---|---|
| National Bank Open: Marta Kostyuk vs Madison Keys | 100% | +44 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set 1 Winner | 100% | +46 pts | — | 99¢ · 100¢ (1¢) | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set Handicap +/-1.5 | 100% | +66 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set Handicap +/-1.5 | 0% | −26 pts | — | — · <1¢ | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Match O/U 22.5 | 0% | −47 pts | — | — · <1¢ | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set 2 Winner | 100% | +46 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Match O/U 21.5 | 0% | −51 pts | — | — · <1¢ | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Total Sets: O/U 2.5 | 0% | −40 pts | — | — · <1¢ | — | ended |
| Completed Match | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set 1 O/U 8.5 | 100% | +38 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set 2 O/U 8.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set 1 O/U 9.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set 2 O/U 9.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set 1 O/U 10.5 | 0% | −36 pts | — | — · <1¢ | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Set 2 O/U 10.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| National Bank Open: Marta Kostyuk vs Madison Keys Match O/U 23.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| When | Trader | Outcome | Bet | Size | P&L now | Insider |
|---|---|---|---|---|---|---|
| 71d |  Kangta6365 | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk>99¢ | $1,998 | −$2 −0.1% | — |
| 71d | tennischamp | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk>99¢ | $2,924 | −$3 −0.1% | — |
| 71d | Raccoon9200 | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk>99¢ | $1,330 | −$1 −0.1% | — |
| 71d | sportsbettor77 | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk>99¢ | $3,870 | −$4 −0.1% | — |
| 71d |  Lawsuitevidencaugust20262 fills | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk96¢ → 100¢ | $15,352 | −$648 −4.2% | — |
| 71d |  alpheclabs | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk>99¢ | $2,997 | −$3 −0.1% | — |
| 71d | Cbrojasg | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk>99¢ | $1,199 | −$5 −0.4% | — |
| 71d | adard17 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk100¢ | $5,000 | +$25 +0.5% | 4 |
| 71d | swisstony11 fills | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk95¢ → 100¢ | $78,128 | +$3,894 +5.0% | 4 |
| 71d | neutralwave23 | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk98¢ → 100¢ | $1,039 | −$19 −1.8% | — |
| 71d |  one8tyfive4 fills | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk98¢ → 100¢ | $36,373 | +$825 +2.3% | 4 |
| 71d | facai168888 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk98¢ → 100¢ | $1,958 | +$42 +2.1% | 4 |
| 71d | Raccoon9200 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk98¢ → 100¢ | $1,088 | +$23 +2.1% | 4 |
| 71d | beeemw | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk98¢ → 100¢ | $2,000 | +$33 +1.6% | 4 |
| 71d | pammbettingbeta | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk99¢ → 100¢ | $2,956 | +$42 +1.4% | 4 |
| 71d |  Casperrino | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk98¢ → 100¢ | $1,680 | −$34 −2.0% | — |
| 71d | 0b1 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk98¢ → 100¢ | $20,000 | +$512 +2.6% | 4 |
| 71d | HomeRunHazard5 fills | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk86¢ → 100¢ | $24,282 | +$3,846 +16% | 5 |
| 71d | De-Damodar-Daar-Ma-Paani | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk97¢ → 100¢ | $1,341 | −$39 −2.9% | — |
| 71d | PAROLIBOYS | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys6¢ → 0¢ | $3,000 | −$3,000 −100% | 6 |
| 71d | Cbrojasg | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk93¢ → 100¢ | $1,120 | +$84 +7.5% | 4 |
| 71d | dmoralez5 fills | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk75¢ → 100¢ | $7,320 | −$2,409 −33% | — |
| 71d | dmoralez6 fills | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk84¢ → 100¢ | $13,303 | +$2,572 +19% | 5 |
| 71d |  tradecraft2 fills | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk68¢ → 100¢ | $9,628 | +$4,578 +48% | 6 |
| 71d | lastdance67 | National Bank Open: Marta Kostyuk vs Madison Keys Set 1 Winner | SellKostyuk>99¢ | $1,875 | −$2 −0.1% | — |
| 71d | Lawsuitevidencaugust2026 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk80¢ → 100¢ | $12,800 | +$3,200 +25% | 5 |
| 71d | tennischamp | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk78¢ → 100¢ | $1,914 | +$540 +28% | 5 |
| 71d | sportsbettor77 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk77¢ → 100¢ | $3,000 | +$874 +29% | 6 |
| 71d | ferrariChampions2026 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys32¢ → 0¢ | $2,639 | −$2,639 −100% | 6 |
| 71d | TexMexTRex | National Bank Open: Marta Kostyuk vs Madison Keys Match O/U 22.5 | BuyOver52¢ → 0¢ | $1,200 | −$1,200 −100% | 6 |
| 71d | HomeRunHazard | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys43¢ → 0¢ | $3,834 | −$3,834 −100% | 6 |
| 71d | Kangta6365 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk60¢ → 100¢ | $1,200 | +$800 +67% | 6 |
| 71d |  RN1 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys40¢ → 0¢ | $1,544 | −$1,544 −100% | 6 |
| 71d | AGUGava2 fills | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys49¢ → 0¢ | $6,077 | −$6,077 −100% | 6 |
| 71d | dmoralez | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys48¢ → 0¢ | $1,599 | −$1,599 −100% | 6 |
| 71d | Rash-Copying2 fills | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys46¢ → 0¢ | $98,974 | −$98,974 −100% | 6 |
| 71d | ebkk590 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk55¢ → 100¢ | $1,100 | +$900 +82% | 6 |
| 71d | Afh1994 | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk54¢ → 100¢ | $1,428 | −$1,217 −85% | — |
| 71d | opeankdngsuxhxbskx | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk55¢ → 100¢ | $2,915 | +$2,385 +82% | 6 |
| 71d |  riggggggedGGGGr | National Bank Open: Marta Kostyuk vs Madison Keys | SellMarta Kostyuk54¢ → 100¢ | $3,253 | −$2,747 −84% | — |
| 71d |  CORGII2 fills | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys45¢ → 0¢ | $5,103 | −$5,103 −100% | 6 |
| 71d | Rash-Copying2 fills | National Bank Open: Marta Kostyuk vs Madison Keys | SellMadison Keys43¢ → 0¢ | $44,801 | +$44,801 +100% | — |
| 71d | AGUGava | National Bank Open: Marta Kostyuk vs Madison Keys Set Handicap +/-1.5 | BuyKeys68¢ → 0¢ | $1,732 | −$1,732 −100% | 6 |
| 71d | miracle11253dsfd | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys46¢ → 0¢ | $2,115 | −$2,115 −100% | 6 |
| 71d | Afh1994 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk56¢ → 100¢ | $1,481 | +$1,164 +79% | 6 |
| 71d | NiNo999 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk56¢ → 100¢ | $5,000 | +$3,929 +79% | 6 |
| 72d | riggggggedGGGGr | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk56¢ → 100¢ | $3,360 | +$2,640 +79% | 6 |
| 72d | comon119 | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys45¢ → 0¢ | $1,800 | −$1,800 −100% | 6 |
| 72d | De-Damodar-Daar-Ma-Paani2 fills | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMarta Kostyuk55¢ → 100¢ | $6,100 | +$4,955 +81% | 6 |
| 72d | RanaAmariPredicts | National Bank Open: Marta Kostyuk vs Madison Keys | BuyMadison Keys46¢ → 0¢ | $1,500 | −$1,500 −100% | 6 |
CORGII11,397 sharesThis market refers to the tennis match between Marta Kostyuk and Madison Keys in the National Bank Open, originally scheduled for August 5, 2026 at 11:00AM ET. This market will resolve to 'Marta Kostyuk' if Marta Kostyuk advances against Madison Keys. This market will resolve to 'Madison Keys' if Madison Keys advances against Marta Kostyuk. 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 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 National Bank Open: Marta Kostyuk vs Madison Keys means the market gives it about 100%.