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: Sep 2, 3:13 PM EST
Kalshi
In the 2026 US Open Women Singles Round Of 64, Marta Kostyuk and Sloane Stephens will compete in a professional tennis match. The outcome depends on who claims victory in the second set of this contest, determining the winner of that specific set.
If Marta Kostyuk wins set 2 in the Marta Kostyuk vs Sloane Stephens professional tennis match in the 2026 US Open Women Singles Round Of 64, then the market resolves to Yes. If Sloane Stephens wins set 2 in the Marta Kostyuk vs Sloane Stephens professional tennis match in the 2026 US Open Women Singles Round Of 64, then the market resolves to Yes.