TOTAL VOLUME:
$134.1b
24H VOL:
$133,388,117
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,436,095,462
405,232
Markets across
30,526
events
MATCHED EVENTS:
2,693
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Aug 31, 12:15 PM EST
Kalshi
This market tracks which player will win the first set in the Stefanos Tsitsipas vs Arthur Fils match at the 2026 US Open, specifically focusing on whether Arthur Fils will claim set 1. On Kalshi, the current probability that Arthur Fils will win the first set stands at 71.0%, while Stefanos Tsitsipas winning the opening set is priced at 27.0%. The market will resolve based on the official match result, with the key catalyst being the match itself scheduled for August 30, 2026.
The market resolves based on the winner of the first set in the Stefanos Tsitsipas vs. Arthur Fils match at the 2026 US Open Men Singles Round of 128. If the match does not occur before any play due to injury, walkover, forfeiture, or cancellation, it will resolve to a fair price. Postponements or delays keep the market open until the rescheduled match concludes, with settlement within two weeks. In cases of retirement during the match, markets that can be settled based on completed play will do so, while unresolved markets will settle at a fair market price determined by the Exchange. Kalshi is not affiliated with the governing league, and all trademarks remain property of their respective owners.
On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. On Kalshi, traders actively set the odds for this market based on their assessments of each player’s likelihood to win the first set. The current top outcome reflects the aggregated expectations of participants, with price fluctuations driven by new analysis, player form, and in-play dynamics as the match approaches.
This market resolves around Aug 30, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The winner of the opening set will be determined during the match itself, and the result will be recorded and verified shortly afterward.
Key signals include player form, injury updates, and recent match statistics. Any last-minute changes to the lineup or playing conditions could shift expectations. Media commentary and expert analysis may also influence trader sentiment. As Aug 30, 2026 approaches, real-time performance in earlier rounds or practice sessions might cause rapid adjustments in this market, especially with low trading volume of $312,389.