TOTAL VOLUME:
$134.2b
24H VOL:
$134,145,987
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,441,166,947
406,422
Markets across
30,383
events
MATCHED EVENTS:
2,688
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Aug 31, 6:09 PM EST
Kalshi
This market focuses on predicting which player, Julia Grabher or Sorana Cirstea, will win the first set of their tennis match at the 2026 US Open Women Singles Round Of 128. The outcome depends solely on the result of set one, regardless of the overall match result. Special conditions address scenarios such as match cancellations, postponements, or retirements during play.
The market resolves based on which player wins the first set of the Julia Grabher vs Sorana Cirstea match in the 2026 US Open Women Singles Round Of 128. If the match does not occur before any play due to injury, walkover, forfeiture, or cancellation, it resolves to a fair price. Postponements keep the market open until the rescheduled match concludes within two weeks. If a player retires during the match, markets that can be settled based on completed play will resolve accordingly, while unresolved markets settle at a fair market price determined by the Exchange. Kalshi is not affiliated with the governing league, and all trademarks belong to their respective owners.
Prediction market odds in this market often reflect sharper, more granular insights than traditional sportsbook lines, because they incorporate real-time trader sentiment and can adjust more frequently. While sportsbooks may publish broader lines for the overall match, this market zeroes in on Set 1 specifics, sometimes showing tighter spreads or different implied probabilities.
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 by the official match result as recorded by tennis governing bodies and match officials. No subjective interpretation is needed — the raw score from the match conclusion settles the contract automatically, aligning with real-world results broadcast worldwide.