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, 12:22 PM EST
Kalshi
The same match features a critical first set where both players, Naomi Osaka and Katerina Siniakova, will battle for initial control. The outcome of this set is pivotal, setting the tone for the rest of the contest and showcasing their strategic approaches right from the start.
If Naomi Osaka wins set 1 in the Naomi Osaka vs Katerina Siniakova professional tennis match in the 2026 US Open Women Singles Round Of 64, then the market resolves to Yes. If Katerina Siniakova wins set 1 in the Naomi Osaka vs Katerina Siniakova professional tennis match in the 2026 US Open Women Singles Round Of 64, then the market resolves to Yes.