TOTAL VOLUME:
$134.2b
24H VOL:
$126,324,530
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,434,646,834
406,019
Markets across
30,401
events
MATCHED EVENTS:
2,689
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Aug 31, 8:15 PM EST
Kalshi
This market tracks the outcome of the first set in a professional tennis match between two players at a major tournament. It reflects who will claim the initial advantage in their head-to-head contest. The result captures the early momentum and performance of each athlete in a high-stakes environment.
If Felix Auger-Aliassime wins set 1 in the Felix Auger-Aliassime vs Rinky Hijikata professional tennis match in the 2026 US Open Men Singles Round Of 128, then the market resolves to Yes. If Rinky Hijikata wins set 1 in the Felix Auger-Aliassime vs Rinky Hijikata 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 collectively set the price through their buying and selling activity. The current top outcome reflects the aggregate assessment of all participants about which player is more likely to win the opening set. As the match approaches, any shifts in player form, injury updates, or weather conditions can cause rapid adjustments in these prices.
This market resolves around Aug 30, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result is determined by the official match records, specifically who claims the first set, and will be finalized once the match concludes and results are widely reported.
Key signals that could shift this market include practice updates, player injury news, changes to match conditions like surface or weather, and any last-minute coaching strategies. As the tournament progresses, early momentum in warm-ups or pre-match interviews may also influence trader sentiment and drive price adjustments right up until the first serve.