Resolution criteria on PolyGram: This market refers to the tennis match between Keisuke Saitoh and Tai Leonard Sach in the ITF Men Gimcheon, originally scheduled for May 27, 2026 at 11:00PM ET. This market will resolve to 'Keisuke Saitoh' if Keisuke Saitoh advances against Tai Leonard Sach. This market will resolve to 'Tai Leonard Sach' if Tai Leonard Sach advances against Keisuke Saitoh. 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
| Completed Match | 100% YES | 0% NO |
| ITF Gimcheon: Keisuke Saitoh vs Tai Leonard Sach | 100% YES | 0% NO |
Keisuke Saitoh and Tai Leonard Sach are scheduled to compete in the ITF Men's Gimcheon tournament on 27 May 2026. The match represents a lower-tier professional tennis 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 Saitoh's advancement, suggesting either substantial backing for the Japanese player or minimal liquidity in the market at present. Settlement occurs on 4 June 2026, allowing a one-week window for the match to conclude.
ITF Men's events at this tier typically feature significant volatility in outcomes, with upsets occurring regularly amongst players ranked outside the ATP top 200. Historical comparable matches show that markets pricing single competitors at extreme probabilities often reflect information asymmetries rather than genuine certainty—factors such as recent form, surface preference, and head-to-head records frequently diverge from crowd sentiment. Without established ATP ranking differentials or prior matchup data between these players, the current pricing warrants scrutiny.
Traders should monitor official ITF scheduling confirmations and any withdrawal announcements through the tournament's official channels in the days preceding 27 May. Surface conditions at the Gimcheon venue, recent tournament results for both players, and any late-stage fitness concerns could shift the underlying match dynamics. The seven-day settlement window provides buffer for delays, though cancellations would trigger a 50-50 resolution regardless of perceived quality differences.
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: Keisuke Saitoh vs Tai Leonard Sach" 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.
$6K 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 4 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.
Explore more prediction market odds and trading opportunities on PolyGram: