Resolution criteria on PolyGram: This market refers to the tennis match between Cristian Garin and Lautaro Midon in the Oeiras 4, originally scheduled for May 11, 2026 at 5:00AM ET. This market will resolve to 'Cristian Garin' if Cristian Garin advances against Lautaro Midon. This market will resolve to 'Lautaro Midon' if Lautaro Midon advances against Cristian Garin. 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.
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
| Oeiras 4: Cristian Garin vs Lautaro Midon Total Sets: O/U 2.5 | 30% YES | 70% NO |
| Oeiras 4: Cristian Garin vs Lautaro Midon Set 1 Winner | 74% YES | 27% NO |
| Oeiras 4: Cristian Garin vs Lautaro Midon Set 1 O/U 8.5 | 64% YES | 36% NO |
| Oeiras 4: Cristian Garin vs Lautaro Midon Set 1 O/U 9.5 | 54% YES | 46% NO |
| Oeiras 4: Cristian Garin vs Lautaro Midon Match O/U 23.5 | 50% YES | 50% NO |
| Oeiras 4: Cristian Garin vs Lautaro Midon Match O/U 21.5 | 50% YES | 50% NO |
| Oeiras 4: Cristian Garin vs Lautaro Midon Match O/U 22.5 | 50% YES | 50% NO |
| Oeiras 4: Cristian Garin vs Lautaro Midon Set 1 O/U 10.5 | 19% YES | 81% NO |
Cristian Garin, the Chilean left-hander ranked outside the top 100, faces Lautaro Midon, an Argentine prospect, in the second round of the Oeiras 4 ATP Challenger event scheduled for 11 May 2026. The current order book on Polymarket prices Garin's advancement at 30%, implying Midon as the favoured outcome. This pricing reflects Garin's recent form struggles and ranking decline after injuries disrupted his career trajectory through 2024–2025, whilst Midon represents emerging South American talent with momentum on clay surfaces typical of Portuguese spring events.
Historical context matters here: Garin has shown volatility in Challenger-level competition, alternating between competitive performances and early exits depending on physical condition and confidence. Midon's record against established ATP players remains limited, but Argentine clay specialists have historically punched above their ranking in Portuguese tournaments. The 30% probability assigned to Garin suggests the market views this as a genuine upset scenario rather than a mismatch, positioning Midon as the baseline expectation.
Traders should monitor official ATP Challenger draw confirmations and any late injury withdrawals in the week preceding 11 May. Surface conditions at Oeiras—typically fast clay—favour aggressive baseline play, which could suit either player depending on their current physical readiness. Weather delays beyond seven days would trigger a 50–50 resolution, a tail risk worth noting given Atlantic coastal weather patterns in May.
This market settles from the official outcome published at https://www.atptour.com/en/scores/current. 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 "Oeiras 4: Cristian Garin vs Lautaro Midon" 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.
$1K in lifetime turnover and $23K of resting liquidity puts this market in the below the median by volume for tennis contracts on PolyGram. Order-book depth is modest — expect a couple of cents of slippage on $1k+ trades.
Last 24 hours alone saw $1K 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.atptour.com/en/scores/current. 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 18 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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