TOTAL VOLUME:

$134.2b

24H VOL:

$134,145,987

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,441,166,947

406,422

Markets across

30,383

events

MATCHED EVENTS:

2,688

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

BETA
Dashboards
Tour
All
Sports
National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar
polymarket

Who will win Siniakova/Zhang vs Errani/Melichar?

Volume:
$5,463

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar

 - Polymarket

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Aug 13, 2026

Closed: Aug 13, 6:30 PM EST

polymarket

Polymarket

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

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$5,463
N/A
N/A
N/A
Settled
Yes
polymarket

Completed Match

100%
Yes 100¢No 0¢
1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set 1 Winner

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

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set 2 O/U 8.5

100%
Yes 100¢No 0¢
0.9¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Total Sets: O/U 2.5

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

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set 1 O/U 8.5

100%
Yes 100¢No 0¢
1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set 2 O/U 9.5

100%
Yes 100¢No 0¢
0.9¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set Handicap +/-1.5

100%
Yes 100¢No 0¢
0.9¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Match O/U 21.5

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

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set 2 Winner

100%
Yes 100¢No 0¢
0.9¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set 1 O/U 9.5

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

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set 2 O/U 10.5

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

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set Handicap +/-1.5

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

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Match O/U 22.5

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

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Set 1 O/U 10.5

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

National Bank Open (Doubles): Siniakova/Zhang vs Errani/Melichar Match O/U 23.5

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

Description

This market refers to the doubles tennis match between Siniakova/Zhang and Errani/Melichar in the National Bank Open, originally scheduled for August 13, 2026 at 3:30PM ET. This market will resolve to 'Siniakova/Zhang' if the team of Siniakova/Zhang advances against Errani/Melichar. This market will resolve to 'Errani/Melichar' if the team of Errani/Melichar advances against Siniakova/Zhang. 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 team advances due to the opponent's retirement, default, or disqualification, this market will resolve to the team who advances. If the match ends in a walkover (a team 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.

Polymarket

This market refers to the doubles tennis match between Siniakova/Zhang and Errani/Melichar in the National Bank Open, originally scheduled for August 13, 2026 at 3:30PM ET. This market will resolve to 'Siniakova/Zhang' if the team of Siniakova/Zhang advances against Errani/Melichar. This market will resolve to 'Errani/Melichar' if the team of Errani/Melichar advances against Siniakova/Zhang. 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 team advances due to the opponent's retirement, default, or disqualification, this market will resolve to the team who advances. If the match ends in a walkover (a team 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

On Polymarket, the National Bank Open doubles market dashboard tracks real-time odds, price fluctuations, and 24-hour volume for this event. It shows how traders on Polymarket are positioning themselves ahead of the match, with updates reflecting market sentiment and liquidity. The dashboard visualizes trends and highlights shifts in betting patterns, giving users insight into crowd-sourced predictions for the tournament outcome.

On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. On Polymarket, this market is priced through continuous trading where participants set odds based on their expectations for the match outcome. The current top outcome reflects the highest chance percentage among traders, with liquidity and volume influencing price stability. As the event approaches, trader sentiment, injury updates, and form can cause rapid shifts in these odds, making real-time tracking essential for informed decisions.

This market resolves around Aug 20, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. The result is determined by the official match conclusion, and the platform will update the market status accordingly. Timing aligns with the tournament schedule, ensuring that all trades settle shortly after the final point is played and results are widely reported.

Injuries, player form, weather conditions, and strategic changes can all shift this market as the event nears. Updates from coaches, recent match performances, and even practice session reports may influence trader confidence. Additionally, any last-minute lineup changes or tournament-specific news could cause rapid price adjustments on Polymarket as participants react to new information ahead of resolution.