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| Outcome | Chance | 24h | 1 week | Bid · Ask | 24h volume | Ends |
|---|---|---|---|---|---|---|
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | 100% | +48 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set Handicap +/-1.5 | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Match O/U 21.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set 2 Winner | 100% | +49 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set 1 Winner | 100% | +51 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set Handicap +/-1.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Total Sets: O/U 2.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set 1 O/U 9.5 | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| Completed Match | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set 1 O/U 8.5 | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set 2 O/U 8.5 | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set 2 O/U 9.5 | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Match O/U 22.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set 1 O/U 10.5 | 0% | −49 pts | — | — · <1¢ | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Set 2 O/U 10.5 | 0% | −49 pts | — | — · <1¢ | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Match O/U 23.5 | 0% | −50 pts | — | — · <1¢ | — | ended |
| US Open, Qualification ATP: Kei Nishikori vs Michael Antonius Game Spread +/-0.5 | 100% | +50 pts | — | >99¢ · 100¢ (<1¢) | — | ended |
| When | Trader | Outcome | Bet | Size | P&L now | Insider |
|---|---|---|---|---|---|---|
| 58d | alexdave888 | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | SellKei Nishikori>99¢ | $9,990 | −$10 −0.1% | — |
| 58d | casper7 | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | SellKei Nishikori93¢ → 100¢ | $1,450 | −$118 −8.1% | — |
| 58d | HomeRunHazard2 fills | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori92¢ → 100¢ | $4,089 | +$332 +8.1% | 5 |
| 58d |  tradecraft | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori86¢ → 100¢ | $1,146 | +$188 +16% | 5 |
| 58d | 0xe98c…8792 | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | SellKei Nishikori84¢ → 100¢ | $2,168 | −$413 −19% | — |
| 58d | omnibus-076daa | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori85¢ → 100¢ | $3,315 | +$585 +18% | 5 |
| 58d | n0tTODAY | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyMichael Antonius12¢ → 0¢ | $2,088 | −$2,088 −100% | 6 |
| 58d | comon1192 fills | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyMichael Antonius22¢ → 0¢ | $4,300 | −$4,300 −100% | 6 |
| 58d | casper7 | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori89¢ → 100¢ | $1,160 | +$143 +12% | 5 |
| 58d |  TRCM | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori62¢ → 100¢ | $1,316 | +$806 +61% | 6 |
| 58d | 0xe98c…8792 | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori61¢ → 100¢ | $1,574 | +$1,006 +64% | 6 |
| 58d | Liverpool1 | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori61¢ → 100¢ | $2,003 | +$1,281 +64% | 6 |
| 58d | RanaAmariPredicts | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori60¢ → 100¢ | $8,500 | +$5,714 +67% | 6 |
| 58d | Dual-Criticism | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori58¢ → 100¢ | $6,338 | +$4,590 +72% | 4 |
| 58d | Horrible-Bias | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyKei Nishikori58¢ → 100¢ | $1,017 | +$736 +72% | 4 |
| 58d | tennissniper777 | US Open, Qualification ATP: Kei Nishikori vs Michael Antonius | BuyMichael Antonius42¢ → 0¢ | $2,372 | −$2,372 −100% | 4 |
88M4,691 sharesThis market refers to the tennis match between Kei Nishikori and Michael Antonius in the US Open, Qualification ATP, originally scheduled for August 26, 2026 at 11:00AM ET. This market will resolve to 'Kei Nishikori' if Kei Nishikori advances against Michael Antonius. This market will resolve to 'Michael Antonius' if Michael Antonius advances against Kei Nishikori. 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 ATP 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 ATP: Kei Nishikori vs Michael Antonius means the market gives it about 100%.