TOTAL VOLUME:
$134.2b
24H VOL:
$126,590,312
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,439,516,703
404,175
Markets across
30,277
events
MATCHED EVENTS:
2,685
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jun 30, 2:23 PM EST
Kalshi
This market covers the game spread in the professional tennis match between Tallon Griekspoor and James Duckworth at the 2026 Wimbledon Men's Singles Round of 128 on June 30. The spread measures the total game differential across the entire match, with different thresholds determining outcomes for Griekspoor.
Resolution is determined by the total game differential across the full match in Tallon Griekspoor's favor. If Griekspoor wins by more than 7.5 games, the -7.5 market resolves Yes. If he wins by more than 4.5 games, the -4.5 market resolves Yes. If he wins by more than 1.5 games, the -1.5 market resolves Yes. If the match does not occur before play begins due to injury, walkover, forfeiture, or cancellation, markets resolve to fair price. Postponements keep markets open until the rescheduled match concludes within two weeks. If a player retires, markets that can be unconditionally settled based on completed play resolve accordingly; others resolve to fair market price at the Exchange's discretion.
Prediction market odds and traditional sportsbook odds often diverge because they reflect different participant bases and incentive structures. Sportsbooks set lines to balance action and protect their margins, while prediction markets aggregate the collective beliefs of traders who have real money at stake on outcomes. This market aggregates trader conviction directly, which can reveal information gaps or contrarian views that sportsbooks may not immediately price in. Comparing the two can highlight where public perception differs from market-derived probabilities, though each serves distinct purposes for bettors and analysts.
On Kalshi, this market is priced through an order-book mechanism where traders buy and sell shares representing the game spread outcome. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each share reflects the collective willingness of buyers and sellers to transact at that level, with tighter spreads indicating higher confidence and liquidity. As new information emerges—such as player form, injury updates, or head-to-head history—traders adjust their bids and offers, moving the market price. This continuous price discovery process ensures the odds remain responsive to changing conditions leading up to the match.
This market resolves around Jun 30, 2026, once the tennis match concludes and the final game spread is verified against credible public sources. The outcome is determined by the actual point differential in the game, compared against the spread level embedded in the market. Resolution occurs after official match data is confirmed and available for review. Traders should monitor the event schedule and any official announcements to stay informed of timing changes or postponements that could affect when this market settles.
Several factors could shift trader positioning before the match. Injury announcements or fitness updates for either player would likely trigger sharp repricing. Recent tournament performance, head-to-head records, and surface-specific form all influence expectations for the game spread. Weather conditions at the venue and court speed can also sway the market, as these variables affect playing style and point outcomes. Media commentary, betting syndicate activity, and shifts in public perception may generate trading volume that moves prices. Traders monitoring these signals can identify opportunities as new information flows into the market.