TOTAL VOLUME:
$134.1b
24H VOL:
$141,541,542
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,440,096,988
406,065
Markets across
30,522
events
MATCHED EVENTS:
2,692
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 3, 1:22 PM EST
Kalshi
In the 2026 US Open Women Singles Round Of 64, Naomi Osaka and Katerina Siniakova will compete in a professional tennis match. The focus here is on determining who will win the second set of this match, adding an additional layer of excitement to the encounter as both players strive for early dominance.
This market resolves based on the winner of the second set in the Naomi Osaka vs Katerina Siniakova professional tennis match at the 2026 US Open Women Singles Round Of 64. If Naomi Osaka wins the second set, the market for her resolves to Yes; if Katerina Siniakova wins the second set, her market resolves to Yes. Should the match not occur due to injury, walkover, forfeiture, or cancellation before play begins, the market resolves to a fair price. Postponements or delays keep the market open until the rescheduled match concludes within two weeks. In cases of retirement during the match, markets that can be settled based on completed play will resolve accordingly, while unresolved markets will settle at a Fair Market Price determined by the Exchange. The Exchange disclaims any official affiliation with the governing league, and all trademarks remain the property of their respective owners.