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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Halle Open: Joao Fonseca vs Yannick Hanfmann
kalshi
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann

Volume:
$182,872

Completed Match

 - Polymarket

Completed Match - Polymarket

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Jun 16, 2026

Closed: Jun 22, 4:00 AM EST

polymarket

Polymarket

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

Completed Match

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$400
N/A
N/A
N/A
Settled
Yes
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann

View
0%
Yes 0¢No 100¢
—
N/A
$172,143
N/A
N/A
N/A
Settled
Yes
kalshi

Over 24.5 games

View
0%
Yes 0¢No 100¢
100¢
N/A
$2,768
N/A
N/A
$2,768
Settled
No
kalshi

Over 19.5 games

View
0%
Yes 0¢No 100¢
100¢
N/A
$2,227
N/A
N/A
$2,217
Settled
No
kalshi

Over 29.5 games

View
0%
Yes 0¢No 100¢
100¢
N/A
$2,100
N/A
N/A
$2,100
Settled
No
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann Match O/U 21.5

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

Halle Open: Joao Fonseca vs Yannick Hanfmann Set 1 O/U 9.5

View
0%
Yes 0¢No 100¢
—
N/A
$1,120
N/A
N/A
N/A
Settled
Yes
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann Set 2 O/U 9.5

View
0%
Yes 0¢No 100¢
—
N/A
$932
N/A
N/A
N/A
Settled
Yes
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann Set Handicap +/-1.5

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

Halle Open: Joao Fonseca vs Yannick Hanfmann Set 1 Winner

View
0%
Yes 0¢No 100¢
—
N/A
$217
N/A
N/A
N/A
Settled
Yes
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann Set 1 O/U 8.5

View
0%
Yes 0¢No 100¢
—
N/A
$147
N/A
N/A
N/A
Settled
Yes
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann Total Sets: O/U 2.5

View
0%
Yes 0¢No 100¢
—
N/A
$90
N/A
N/A
N/A
Settled
Yes
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann Match O/U 23.5

View
0%
Yes 0¢No 100¢
—
N/A
$52
N/A
N/A
N/A
Settled
Yes
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann Set 2 Winner

View
0%
Yes 0¢No 100¢
—
N/A
$29
N/A
N/A
N/A
Settled
Yes
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann Set 1 O/U 10.5

View
0%
Yes 0¢No 100¢
—
N/A
$16
N/A
N/A
N/A
Settled
Yes
polymarket

Halle Open: Joao Fonseca vs Yannick Hanfmann Match O/U 22.5

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

Halle Open: Joao Fonseca vs Yannick Hanfmann Set 2 O/U 8.5

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

Halle Open: Joao Fonseca vs Yannick Hanfmann Set 2 O/U 10.5

View
0%
Yes 0¢No 100¢
—
N/A
$5
N/A
N/A
N/A
Settled
Yes
Total markets: 18

Description

This event group covers a professional tennis match between Joao Fonseca and Yannick Hanfmann at the 2026 ATP Halle Open (Round of 32), scheduled for June 15, 2026 at 4:00 AM ET. Markets track both the match winner and match completion status, with additional over/under markets on total games played.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: Kalshi markets measure total games completed (settlement value), while Polymarket markets measure match winner and completion status (binary events). These are different market archetypes with non-overlapping resolution criteria.Hero tip: Do not treat these as redundant markets. Kalshi's games-over/under markets are independent of Polymarket's winner/completion markets. A match can have a clear winner (Polymarket resolves) while still failing Kalshi's game-count thresholds, or vice versa. Track ATP official match statistics separately for each platform.

Critical divergence points:

  • Kalshi: Three settlement-value markets on total games completed. Resolves Yes if completed games exceed 19.5, 24.5, or 29.5 respectively in the full match. Key Quote: 'If the number of completed games in the full match is above [threshold]...then the market resolves to Yes.'
  • Polymarket: Two binary markets: (1) Match Winner—resolves to Fonseca or Hanfmann if either advances; 50-50 if walkover, tie, or >7 day delay. (2) Match Completion—resolves Yes only if all games/sets played to completion under normal play; No if incomplete, retirement, default, or cancellation. Key Quote: 'This market will resolve to Yes if all games and sets required to determine a match winner...are played to completion through normal play. Otherwise...it will resolve to No.'
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 Joao Fonseca and Yannick Hanfmann in the Halle Open, originally scheduled for June 15, 2026 at 4:00AM ET. This market will resolve to 'Joao Fonseca' if Joao Fonseca advances against Yannick Hanfmann. This market will resolve to 'Yannick Hanfmann' if Yannick Hanfmann advances against Joao Fonseca. 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 ATP Tour. A consensus of credible reporting may also be used.

Kalshi

The event resolves based on the total number of completed games in the full match between Joao Fonseca and Yannick Hanfmann at the 2026 ATP Halle Round of 32. If the match does not occur before play begins due to injury, walkover, forfeiture, or cancellation, the market resolves to fair price. If postponed or delayed, the market remains open and closes after the rescheduled match concludes within two weeks. If a player retires, markets that can be unconditionally settled based on completed play resolve accordingly; those that cannot are settled at fair market price at the Exchange's discretion.

Frequently asked questions

Prediction markets and traditional sportsbooks price outcomes differently. Sportsbooks set odds to balance liability and extract margin; prediction markets aggregate trader beliefs through continuous price discovery. This market reflects what thousands of independent traders believe will happen, often incorporating real-time information faster than sportsbooks adjust. Comparing the two can reveal edge opportunities—if sportsbook odds diverge significantly from this market's consensus, it may signal mispricing or new information not yet reflected in one venue.

Polymarket and Kalshi operate under different market designs and user bases, which naturally creates pricing gaps. Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Polymarket uses an automated market maker model, while Kalshi employs order books; each attracts different trader demographics and risk appetites. Liquidity depth, fee structures, and settlement mechanics also vary. These structural differences mean the same event can trade at different probabilities across platforms—a spread that savvy traders monitor for arbitrage or consensus-building signals.

Key catalysts include recent player form, head-to-head records, injury reports, and court conditions at the Halle Open. Betting line movements from major sportsbooks often precede prediction market shifts, so tracking those can provide early signals. Tournament draws, seeding changes, and pre-match commentary from analysts may also influence trader positioning. Weather, player statements, or unexpected withdrawals could trigger sharp repricing. Watch for volume spikes—they often coincide with breaking news or significant conviction changes among the trader base.