TOTAL VOLUME:
$134.2b
24H VOL:
$130,522,377
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jun 12, 9:00 PM EST
Polymarket
This market refers to the tennis match between Youssef Kadiri Hassani and Hiromasa Koyama in the ITF Men Harmon, originally scheduled for June 5, 2026 at 9:00PM ET. This market will resolve to 'Youssef Kadiri Hassani' if Youssef Kadiri Hassani advances against Hiromasa Koyama. This market will resolve to 'Hiromasa Koyama' if Hiromasa Koyama advances against Youssef Kadiri Hassani. 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 International Tennis Federation (ITF). A consensus of credible reporting may also be used.
Prediction market odds on Polymarket for this ITF Harmon match often differ from traditional sportsbook lines because they reflect real-time trader sentiment rather than fixed bookmaker pricing. Sportsbooks typically adjust odds more slowly and build in margin, while prediction markets update continuously as new bets flow in. For Kadiri Hassani versus Koyama, comparing Polymarket implied probabilities to major sportsbook spreads can reveal where the crowd on each venue disagrees about match outcome likelihood. These differences often reflect varying access to player form data, injury reports, and court conditions.
On Polymarket, the Kadiri Hassani versus Koyama match is priced through an automated market maker that converts trader bets into real-time implied probabilities for each outcome. On Polymarket, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Prices move as traders buy and sell shares, with each transaction shifting the odds to reflect new consensus. The current price reflects the marginal trader's view of match likelihood. Polymarket's transparent order flow and continuous pricing mean odds can shift rapidly based on breaking news about player fitness, surface conditions, or recent performance data relevant to this ITF Harmon event.
The ITF Harmon: Youssef Kadiri Hassani vs Hiromasa Koyama market resolves on Jun 13, 2026. Resolution is determined by the official result of the match as recorded by the ITF and confirmed by the host tournament. The outcome is binary: either Kadiri Hassani wins or Koyama wins. Once the match concludes and the official result is published, the market settles according to the winner. Traders holding shares in the winning outcome receive their payout, while losing positions expire worthless.
Several factors could shift odds for Kadiri Hassani versus Koyama before Jun 13, 2026. Recent tournament results or ranking changes for either player often trigger repricing. Injury announcements, withdrawal news, or fitness updates can dramatically alter market probability. Court surface conditions and weather forecasts closer to match day influence expectations. Head-to-head history or coaching changes may prompt trader repositioning. Player form in practice sessions or warm-up matches can move the needle. Large institutional bets or sudden volume spikes sometimes signal new information entering the market, causing rapid odds adjustments.