TOTAL VOLUME:
$134b
24H VOL:
$107,351,958
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,416,970,024
400,720
Markets across
30,097
events
MATCHED EVENTS:
2,633
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 1, 9:45 PM EST
Kalshi
This market focuses on predicting which player, Tatjana Maria or Jelena Ostapenko, will claim the first set in their 2026 US Open Women Singles Round Of 128 match. The outcome depends solely on the result of Set 1, regardless of how the overall match concludes. Special provisions address scenarios where the match cannot proceed as scheduled.
If Tatjana Maria wins set 1 in the Tatjana Maria vs Jelena Ostapenko professional tennis match in the 2026 US Open Women Singles Round Of 128, then the market resolves to Yes. If Jelena Ostapenko wins set 1 in the Tatjana Maria vs Jelena Ostapenko professional tennis match in the 2026 US Open Women Singles Round Of 128, then the market resolves to Yes.
On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. On Kalshi, traders manually set prices through buying and selling contracts that represent either outcome of the first set. The current implied chance reflects the collective judgment of participants, adjusting continuously with each trade. Volume of $93,013 shows the level of interest and liquidity supporting these price movements.
This market resolves around Aug 30, 2026, with the outcome confirmed once the match result is verifiable from credible public reporting. The winner of the first set — based on officially recognized match records — will settle all positions, and contracts will pay out accordingly based on the final verified result.
Key signals that could shift prices in this market include last-minute player injuries, weather delays affecting serve performance, or strategic changes in coaching approaches right before the match starts. Any public updates from official tournament sources or recognized media outlets may also cause rapid reassessments among traders as the start time approaches.