Resolution criteria on PolyGram: This market refers to the tennis match between Chan-Yeong Oh and Tai Leonard Sach in the ITF Men Andong, originally scheduled for May 13, 2026 at 9:00PM ET. This market will resolve to 'Chan-Yeong Oh' if Chan-Yeong Oh advances against Tai Leonard Sach. This market will resolve to 'Tai Leonard Sach' if Tai Leonard Sach advances against Chan-Yeong Oh. 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 Andong: Chan-Yeong Oh vs Tai Leonard Sach | 41% YES | 59% NO |
| Completed Match | 50% YES | 51% NO |
Chan-Yeong Oh faces Tai Leonard Sach in an ITF Men's tournament match scheduled for 13 May 2026 in Andong, South Korea. The current order book on Polymarket prices Oh's advancement at 40%, reflecting modest confidence in the South Korean player despite home-court advantage. The settlement window extends to 21 May, allowing a seven-day buffer for rescheduling before the market resolves to a 50-50 split.
ITF Men's circuit matches at this level typically feature significant variance in player form and preparation. Oh competes regularly on the ITF circuit and benefits from playing in his home country, a factor that historically correlates with improved performance in lower-tier professional tournaments. Sach, competing internationally, would need to overcome both travel fatigue and the home-crowd disadvantage that often affects visiting players in regional ITF events. The 40% probability suggests the market views this as relatively competitive, with slight favour toward Sach despite the venue disadvantage.
Key variables for traders include confirmation of both players' entry status and any last-minute withdrawals, which occur with measurable frequency on the ITF circuit. Weather conditions in Andong during mid-May could affect match scheduling, particularly if rain forces postponement beyond the seven-day window. Tournament draws and seeding announcements, typically released one week before competition, will provide clarity on whether either player faces preliminary rounds or direct entry. Monitoring ITF official communications and player social media for injury updates remains essential, as physical issues frequently emerge in the final week before regional tournaments.
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 Andong: Chan-Yeong Oh 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.
$7 in lifetime turnover and $391 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.
Last 24 hours alone saw $7 in turnover, well above the lifetime daily-average for this market — a clear sign of news catalysing trader activity right now.
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 21 May 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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