TOTAL VOLUME:

$134.1b

24H VOL:

$133,388,117

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,436,095,462

405,232

Markets across

30,526

events

MATCHED EVENTS:

2,693

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

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Sports
Grass Court Championships, Qualification: Diane Parry vs Ella Seidel
polymarket
kalshi

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel

Volume:
$660,077

Diane Parry

all

2 markets

Kalshi

Polymarket

consensus

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Jun 15, 2026

Closed: Jun 15, 6:05 AM 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

Diane Parry

View
100%
Yes 100¢No 0¢
100¢
N/A
$303,959
N/A
N/A
$130,970
Settled
Yes
polymarket

Completed Match

100%
Yes 100¢No 0¢
0.1¢
N/A
$50
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel

100%
Yes 100¢No 0¢
0.1¢
N/A
$203,339
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Set 1 Winner

100%
Yes 100¢No 0¢
0.1¢
N/A
$652
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Set Handicap +/-1.5

100%
Yes 100¢No 0¢
0.1¢
N/A
$609
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Set 2 Winner

100%
Yes 100¢No 0¢
0.1¢
N/A
$85
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Set 1 O/U 8.5

100%
Yes 100¢No 0¢
0.1¢
N/A
$17
N/A
N/A
N/A
Settled
Yes
kalshi

Ella Seidel

0%
Yes 0¢No 100¢
100¢
N/A
$144,406
N/A
N/A
$60,489
Settled
No
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Set Handicap +/-1.5

0%
Yes 0¢No 100¢
—
N/A
$6,408
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Match O/U 21.5

0%
Yes 0¢No 100¢
—
N/A
$374
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Match O/U 22.5

0%
Yes 0¢No 100¢
—
N/A
$168
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Set 1 O/U 9.5

0%
Yes 0¢No 100¢
—
N/A
$5
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Set 1 O/U 10.5

0%
Yes 0¢No 100¢
—
N/A
$5
N/A
N/A
N/A
Settled
Yes
polymarket

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel 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

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Match O/U 23.5

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

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Total Sets: O/U 2.5

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

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel 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

Grass Court Championships, Qualification: Diane Parry vs Ella Seidel Set 2 O/U 10.5

0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
Total markets: 18

Intro

This market tracks the set handicap outcome in the Grass Court Championships Qualification match between Diane Parry and Ella Seidel, with Parry favored at a -1.5 set handicap. The aggregated consensus across Polymarket and Kalshi shows 100.0% probability for the Parry (-1.5) vs Seidel (+1.5) handicap outcome. Resolution will be determined by official WTA Tennis scores. Watch for the match completion on June 13, 2026, which will establish the final set count used for handicap settlement.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: Polymarket and Kalshi define match resolution differently for non-completion scenarios. Polymarket's completion market treats retirement, walkover, and forfeit as non-completion ("No"), while Kalshi's winner markets treat any player advancement after a ball is played as a valid resolution ("Yes").Hero tip: If the match begins but ends via retirement, default, or walkover before completion, Polymarket completion bets and Kalshi winner bets will resolve in opposite directions. Hedge accordingly or avoid simultaneous exposure across both platforms for this specific edge case.

Critical divergence points:

  • Polymarket: Completion and winner markets require normal play through all sets. Retirement, walkover, default, or forfeit of any kind triggers "No" resolution on completion market. Winner market resolves 50-50 on walkover but to the advancing player on retirement/default. Key Quote: 'If a forfeit of any kind occurs, including but not limited to a walkover or retirement, this market will resolve No.'
  • Kalshi: Winner markets resolve "Yes" for either player if they win after a ball has been played, explicitly including scenarios where one player advances due to opponent retirement or default. No distinction between normal completion and retirement advancement. Key Quote: 'If [player] wins the Parry vs Seidel professional tennis match in the 2026 Berlin Qualification Round 1 after a ball has been played, then the market resolves to Yes.'
Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.

Polymarket

This market refers to the tennis match between Diane Parry and Ella Seidel in the Grass Court Championships, Qualification, originally scheduled for June 13, 2026 at 8:00AM ET. This market will resolve to 'Diane Parry' if Diane Parry advances against Ella Seidel. This market will resolve to 'Ella Seidel' if Ella Seidel advances against Diane Parry. 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.

Kalshi

Resolution requires that a ball has been played in the match. The market resolves based on the official match result once play has commenced. If the match is cancelled before any ball is played due to injury, walkover, forfeiture, or other circumstances, the market resolves to a fair price per standard rules. Should the match be postponed or delayed, the market remains open and closes following the rescheduled match completion, provided this occurs within two weeks of the original date.

Frequently asked questions

Prediction markets and traditional sportsbooks price outcomes differently because they use distinct mechanisms. Sportsbooks set odds based on internal models and manage risk through margin; prediction markets aggregate trader beliefs in real time, with prices reflecting supply and demand. Prediction market odds often incorporate faster-moving information and can shift more fluidly as new data emerges. For this match, comparing this market's odds to major sportsbook lines can reveal value opportunities. Prediction markets tend to be more efficient when liquidity is high, as seen here, making them a useful reference point for serious bettors and analysts.