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: Aug 30, 6:59 PM EST
Kalshi
This market focuses on predicting which player will win the first set of a specific tennis match at the 2026 US Open. It allows participants to speculate on the immediate performance of the athletes in the opening stage of their competition. The outcome depends solely on the result of the first set, regardless of how the entire match ultimately concludes.
If Sebastian Gorzny wins set 1 in the Sebastian Gorzny vs Raphael Collignon professional tennis match in the 2026 US Open Men Singles Round Of 128, then the market resolves to Yes. If Raphael Collignon wins set 1 in the Sebastian Gorzny vs Raphael Collignon professional tennis match in the 2026 US Open Men 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 actively set the price for this market through their bids and offers, which determines the current implied probability for each possible set winner. The platform’s order book reflects collective expectations about the first-set outcome, with volume of $15,126 showing the level of interest and liquidity available for traders looking to place bets.
This market resolves around Aug 30, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result will be determined by the official match result, specifically who claims the first set, and will be updated automatically on the platform once the information is widely reported and confirmed.
Key signals such as player form leading up to the match, recent performance statistics, any last-minute injuries or changes in lineup, and even weather conditions — if relevant — could shift this market. As new information emerges, traders may adjust their positions, causing the odds to fluctuate sharply in the days or hours before the match gets under way.