TOTAL VOLUME:
$134.1b
24H VOL:
$113,466,932
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,423,222,590
402,751
Markets across
30,217
events
MATCHED EVENTS:
2,632
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Aug 31, 7:25 PM EST
Kalshi
This market tracks the outcome of the first set in a professional tennis match between Elisabetta Cocciaretto and Katerina Siniakova at the 2026 US Open. The focus is on determining which player will claim victory in the initial set of this high-stakes tournament match. The result reflects the competitive performance of both athletes in the early stages of their encounter.
If Elisabetta Cocciaretto wins set 1 in the Elisabetta Cocciaretto vs Katerina Siniakova professional tennis match in the 2026 US Open Women Singles Round Of 128, then the market resolves to Yes. If Katerina Siniakova wins set 1 in the Elisabetta Cocciaretto vs Katerina Siniakova professional tennis match in the 2026 US Open Women Singles Round Of 128, then the market resolves to Yes.
On Kalshi, this market reflects trader sentiment rather than traditional sportsbook lines. Prediction market odds can diverge because they incorporate real-time betting activity and may adjust faster to new information. Sportsbook odds often factor in broader public betting patterns and house margins. Traders on Kalshi set prices based on their expectations for the Set 1 winner, which can lead to different implied probabilities compared to sportsbooks. This difference allows bettors to compare valuations and potentially find value based on where they think the true probability lies.
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 will determine the final settlement, based on officially recorded match results from the event organizers or widely trusted sports news outlets.
Several signals could shift this market before Aug 30, 2026. Key player form, recent match performances, and any last-minute injuries or lineup changes will heavily influence trader sentiment. Media coverage highlighting strengths or weaknesses for either competitor may also sway odds. As the match approaches, updated practice sessions or warm-up results might cause rapid adjustments. Any unexpected developments — such as weather conditions or rule changes — could further impact expectations and move the pricing on Kalshi.