TOTAL VOLUME:

$134b

24H VOL:

$107,351,958

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,416,970,024

400,720

Markets across

30,097

events

MATCHED EVENTS:

2,633

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Cincinnati Open: Sara Bejlek vs Madison Keys
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys

Volume:
$2,095,331

Cincinnati Open: Sara Bejlek vs Madison Keys

 - Polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Aug 21, 2026

Closed: Aug 21, 4:18 PM EST

polymarket

Polymarket

View
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys

View
100%
66%
Yes 100¢No 0¢
0.1¢
N/A
$2,014,621
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Match O/U 21.5

100%
51%
Yes 100¢No 0¢
0.1¢
N/A
$8,090
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Total Sets: O/U 2.5

100%
61%
Yes 100¢No 0¢
0.1¢
N/A
$5,690
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set 2 Winner

100%
58%
Yes 100¢No 0¢
0.1¢
N/A
$2,320
N/A
N/A
N/A
Settled
Yes
polymarket

Completed Match

100%
Yes 100¢No 0¢
0.1¢
N/A
$506
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set 1 O/U 8.5

100%
Yes 100¢No 0¢
0.1¢
N/A
$223
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Match O/U 22.5

100%
56%
Yes 100¢No 0¢
0.1¢
N/A
$36
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set Handicap +/-1.5

0%
46%
Yes 0¢No 100¢
—
N/A
$59,853
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set 1 Winner

0%
42%
Yes 0¢No 100¢
—
N/A
$2,923
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set Handicap +/-1.5

0%
49%
Yes 0¢No 100¢
—
N/A
$973
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set 1 O/U 9.5

0%
Yes 0¢No 100¢
—
N/A
$96
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set 2 O/U 8.5

100%
Yes 100¢No 0¢
0.1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set 2 O/U 9.5

100%
Yes 100¢No 0¢
0.1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set 2 O/U 10.5

0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Match O/U 23.5

100%
59%
Yes 100¢No 0¢
0.1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

Cincinnati Open: Sara Bejlek vs Madison Keys Set 1 O/U 10.5

0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
Total markets: 16

Intro

This market tracks whether the Sara Bejlek versus Madison Keys match at the Cincinnati Open will have more or less than 21.5 games, and on Polymarket the current probability for exceeding 21.5 games is 100%, according to scores posted at https://www.wtatennis.com/scores. The match originally scheduled for August 21, 2026 at 11:00AM ET will serve as the key reference point for resolution.

Polymarket

This market refers to the tennis match between Sara Bejlek and Madison Keys in the Cincinnati Open, originally scheduled for August 21, 2026 at 11:00AM ET. This market will resolve to 'Sara Bejlek' if Sara Bejlek advances against Madison Keys. This market will resolve to 'Madison Keys' if Madison Keys advances against Sara Bejlek. If the match is canceled (not played at all), ends in a tie, or is delayed beyond 7 days from the scheduled date without a winner determined, this market will resolve to 50-50. If the match begins but is not completed, and one player advances due to the opponent's retirement, default, or disqualification, this market will resolve to the player who advances. If the match ends in a walkover (player withdraws before the start and the other advances automatically), this market will resolve to 50-50. The primary resolution source will be official information from the WTA Tour. A consensus of credible reporting may also be used.

Frequently asked questions

This market resolves around Aug 28, 2026, with the outcome confirmed once the match result is verifiable from credible public reporting. The final price will reflect whether the match concludes in a win for either player or another official result as defined by the event organizers.

Key signals that could shift this market include last-minute player injuries, weather updates affecting match conditions, or changes to the tournament schedule. High-profile analyst commentary, recent match performances, and betting trends on Polymarket also influence trader sentiment. As Aug 28, 2026 approaches, any news impacting either competitor’s readiness or form may cause rapid price swings, so monitoring pre-match updates is crucial.