Resolution criteria on PolyGram: This market refers to the tennis match between Hiromasa Koyama and Jake Delaney in the ITF Men Karuizawa, originally scheduled for May 29, 2026 at 9:00PM ET. This market will resolve to 'Hiromasa Koyama' if Hiromasa Koyama advances against Jake Delaney. This market will resolve to 'Jake Delaney' if Jake Delaney advances against Hiromasa Koyama. 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.
PolyGram is an on-chain prediction market where you trade YES or NO outcome shares with real USDC on Polygon. For this market, buy YES if you believe the event will happen, or NO if you think it won't. Your maximum loss is your stake — winning shares pay $1.00 each at resolution. Unlike sportsbooks, there is no house edge: prices are set by supply and demand from other traders and reflect the crowd's real-time probability.
Market outcomes
| ITF Karuizawa: Hiromasa Koyama vs Jake Delaney | 0% YES | 100% NO |
| Completed Match | 100% YES | 0% NO |
Hiromasa Koyama, a Japanese ITF circuit regular, faces American Jake Delaney in the men's draw at the ITF Karuizawa tournament scheduled for 29 May 2026. The match is set for 9:00 PM ET, with the settlement window closing on 6 June 2026. On Polymarket's order book, the current crowd-implied probability stands at 0% YES, indicating no meaningful liquidity or conviction behind either player at present. This extreme reading typically reflects either minimal trading activity or a technical issue in order book formation rather than genuine market consensus.
ITF Men's events at the Karuizawa venue historically attract a mix of Japanese domestic players and international challengers seeking ranking points. Koyama's home advantage and familiarity with court conditions at Karuizawa are material factors, though his ranking and recent form relative to Delaney's trajectory will determine substantive probability shifts. Delaney's performance on hard courts and his recent match results against comparable opponents provide the baseline for comparative assessment.
Traders should monitor tournament draw confirmations, any withdrawal announcements, and weather conditions affecting the Karuizawa schedule in late May. The 7-day delay clause creates settlement ambiguity if the match is postponed beyond 5 June without completion. Recent ITF tournament reports and both players' ATP/ITF ranking updates through May will clarify the competitive gap. Current zero probability suggests the market awaits initial liquidity; meaningful price discovery typically emerges once opening orders establish a reference point.
This market settles from the official outcome published at https://www.itftennis.com/en/tournament-calendar/. A proposer submits the final result to the UMA optimistic oracle on Polygon; the two-hour dispute window closes and payouts clear in USDC.
The mechanics for trading "ITF Karuizawa: Hiromasa Koyama vs Jake Delaney" are the same as any other PolyGram sporting event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.
$2K in lifetime turnover and $0 of resting liquidity puts this market in the below the median by volume for sports contracts on PolyGram. Order-book depth is thin — large orders may need to be split across the book or executed as limit orders.
The market has been open for under a month — fresh enough that information asymmetry remains a real factor.
Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.
Resolution is sourced from https://www.itftennis.com/en/tournament-calendar/. Settlement is executed by the UMA optimistic oracle on Polygon, with a 2-hour dispute window before payouts clear.
This prediction market is scheduled to close on 6 June 2026. After the resolving event occurs, settlement typically clears within 24 hours once the UMA optimistic oracle confirms the outcome. All payouts are in USDC on the Polygon network.
To trade on this prediction market, create a free PolyGram account at polygram.ink, deposit USDC via Polygon, and place a YES or NO order on the outcome you believe in. You can learn more on our how-it-works page. Your maximum loss is limited to your stake — there is no leverage or margin.
When the outcome is determined, winning YES shares pay out $1.00 each in USDC, while losing shares pay $0. Settlement is handled by the UMA optimistic oracle on Polygon — a proposer submits the result, a two-hour dispute window opens, and if uncontested, payouts are distributed automatically. You can withdraw your winnings to any Polygon wallet.
Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.
Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.
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