Analytics
The Daniil Ostapenkov side is at 90.5% on Polymarket.
It is one of 16 markets under “Sioux Falls: Daniil Ostapenkov vs Quinn Vandecasteele”.
$20.48K traded in the last 24 hours. The order book holds $115.97K, with a 1.0% gap between the best bid and the best ask. Across the latest 213 trades, $10.8K bought Daniil Ostapenkov and $1.89K bought Quinn Vandecasteele; the largest was a $1.01K buy of Daniil Ostapenkov at 64.0¢.
The largest Daniil Ostapenkov position is UpTheBlues with 10.6K shares; the largest Quinn Vandecasteele position is CandleHammerDrums with 3.6K. Ten wallets hold 76.9% of the shares on Polymarket's public holder list.
Trading closes on 1 Nov 2026, 7 days from now.
Polymarket prices as of Oct 25, 6:58 PM UTC
The paper ticket needs a verified Yes / No pair, which this market does not have here.
Open in PredictionsDaily closes of the Daniil Ostapenkov price, Polymarket CLOB, 1 point, 25 Oct 2026, chart shows 86%–98%
| Observed | Daniil Ostapenkov price |
|---|---|
| 25 Oct 2026 | 91.5% |
The ten largest positions on Polymarket's public holder list.
| Trader | Outcome | Shares |
|---|---|---|
| UpTheBlues | Daniil Ostapenkov | 10.62K |
| CandleHammerDrums | Quinn Vandecasteele | 3.6K |
| thestingsnake | Daniil Ostapenkov | 2.9K |
This market refers to the tennis match between Daniil Ostapenkov and Quinn Vandecasteele in the Sioux Falls, USA, Qualifying, originally scheduled for October 25, 2026 at 12:10PM ET. This market will resolve to 'Daniil Ostapenkov' if Daniil Ostapenkov advances against Quinn Vandecasteele. This market will resolve to 'Quinn Vandecasteele' if Quinn Vandecasteele advances against Daniil Ostapenkov. If the match is canceled (not played at all), ends in a tie, or a winner has not been determined by November 8, 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.
Official listing: polymarket.com/event/atp-ostapen-vandeca-2026-10-25
4 more markets, none above 50.0%.
| 38791873984189 | Quinn Vandecasteele | 2.86K |
| efntrick | Quinn Vandecasteele | 2.61K |
| Multicolored-Pimple-Insomnia | Quinn Vandecasteele | 2.19K |
| Irresponsible-Autumn | Quinn Vandecasteele | 1.8K |
| Delirious-Summer | Quinn Vandecasteele | 1.2K |
| Val99977 | Daniil Ostapenkov | 1.05K |
| ferrariChampions2026 | Daniil Ostapenkov | 989.36 |
Open a trader’s name to inspect the wallet’s available P&L, positions and recorded trades, with source dates and coverage. A large position alone does not establish a winning track record.
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