Resolution criteria on PolyGram: This market refers to the tennis match between Seongwoo Cho and Daisuke Sumizawa in the ITF Men Gimcheon, originally scheduled for May 25, 2026 at 10:00PM ET. This market will resolve to 'Seongwoo Cho' if Seongwoo Cho advances against Daisuke Sumizawa. This market will resolve to 'Daisuke Sumizawa' if Daisuke Sumizawa advances against Seongwoo Cho. 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 Gimcheon: Seongwoo Cho vs Daisuke Sumizawa | 100% YES | 0% NO |
| Completed Match | 100% YES | 0% NO |
Seongwoo Cho, a South Korean player, faces Japan's Daisuke Sumizawa in the ITF Men's Gimcheon tournament, scheduled for 25 May 2026. The match represents a lower-tier professional fixture on the ITF circuit, where both players compete for ranking points and prize money. The current order book on Polymarket reflects a 100% implied probability for Cho's advancement, suggesting the market has priced in either substantial form differential, head-to-head history, or surface preference data favouring the South Korean competitor.
ITF Men's events at this tier typically feature volatile matchups between players ranked outside the ATP top 200. Historical precedent shows that such heavily skewed probabilities—particularly at 100%—often reflect either incomplete information on one player's recent form or a significant disparity in ranking positions. Markets at this probability level carry execution risk; any unexpected withdrawal, injury disclosure, or recent tournament result contradicting the consensus can trigger sharp repricing.
Traders should monitor ITF official announcements regarding player confirmations through late May, as lower-ranked events see higher withdrawal rates than ATP fixtures. Surface conditions at the Gimcheon venue and any late-breaking injury reports will be critical catalysts. The settlement window closes 2 June 2026, providing a narrow window for resolution. Any match delay beyond 7 days without completion triggers a 50-50 resolution, introducing tail risk that the current order book may not fully account for.
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 Gimcheon: Seongwoo Cho vs Daisuke Sumizawa" are the same as any other PolyGram 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.
$510 in lifetime turnover and $0 of resting liquidity puts this market in the below the median by volume for tennis 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 2 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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