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%

BETA
Dashboards
Insights
Indices
Tour
All
Trending
Breaking
New
Ending Soon
Politics
Sports
Crypto
Companies
Elections
Financials
Economics
Other
Entertainment
Science and Technology
Marta Kostyuk vs Sloane Stephens: Set 1 Winner
kalshi

Marta Kostyuk vs Sloane Stephens: Set 1 Winner

Volume:
$197,471

Marta Kostyuk

 - Kalshi

Marta Kostyuk - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Aug 18, 2026

Closed: Aug 18, 4:05 PM EST

kalshi

Kalshi

View
Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Marta Kostyuk

View
100%
Yes 100¢No 0¢
100¢
N/A
$129,666
N/A
N/A
$100,540
Settled
Yes
kalshi

Sloane Stephens

View
0%
Yes 0¢No 100¢
100¢
N/A
$67,804
N/A
N/A
$49,191
Settled
No
Total markets: 2

Description

This market focuses on predicting which player will win the first set of a tennis match between Marta Kostyuk and Sloane Stephens. The outcome depends solely on the result of the first set, regardless of the final match result. It reflects the competitive dynamics and early-game performance of both athletes in a key professional tournament.

Kalshi

If Marta Kostyuk wins set 1 in the Marta Kostyuk vs Sloane Stephens professional tennis match in the 2026 WTA Cincinnati Round Of 32, then the market resolves to Yes. If Sloane Stephens wins set 1 in the Marta Kostyuk vs Sloane Stephens professional tennis match in the 2026 WTA Cincinnati Round Of 32, then the market resolves to Yes.