Resolution criteria on PolyGram: This market refers to the tennis match between Laslo Djere and Gustavo Heide in the Oeiras 4, originally scheduled for May 12, 2026 at 7:30AM ET. This market will resolve to 'Laslo Djere' if Laslo Djere advances against Gustavo Heide. This market will resolve to 'Gustavo Heide' if Gustavo Heide advances against Laslo Djere. 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: Laslo Djere vs Gustavo Heide | 60% YES | 41% NO |
| Completed Match | 50% YES | 50% NO |
| Oeiras 4: Laslo Djere vs Gustavo Heide Total Sets: O/U 2.5 | 66% YES | 34% NO |
| Oeiras 4: Laslo Djere vs Gustavo Heide Match O/U 21.5 | 50% YES | 50% NO |
| Oeiras 4: Laslo Djere vs Gustavo Heide Set 1 O/U 8.5 | 50% YES | 50% NO |
| Oeiras 4: Laslo Djere vs Gustavo Heide Set 1 Winner | 32% YES | 69% NO |
| Oeiras 4: Laslo Djere vs Gustavo Heide Match O/U 22.5 | 50% YES | 50% NO |
| Oeiras 4: Laslo Djere vs Gustavo Heide Set 1 O/U 9.5 | 50% YES | 50% NO |
Laslo Djere and Gustavo Heide are scheduled to meet in the Oeiras 4 tournament on 12 May 2026 at 7:30 AM ET. The current order book on Polymarket prices Djere's advancement at 60 per cent, reflecting a modest favourite's position. The settlement window closes on 19 May, allowing a seven-day buffer for fixture delays or completion issues; matches that remain unresolved beyond that threshold or end without a winner resolve to 50–50.
Djere, a Serbian player ranked in the ATP's mid-tier, has competed regularly on the ATP Challenger circuit where Oeiras typically sits. Heide, a Brazilian prospect, has shown variable form across Challenger events. Historical patterns suggest that seeding, recent match fitness, and surface preference (clay at Oeiras) drive outcomes more than raw ranking gaps at this level. The 60–40 split implies the market views Djere as marginally better positioned, though the probability remains competitive enough to suggest meaningful uncertainty about form or matchup dynamics.
Traders should monitor ATP Challenger draw confirmations and any injury bulletins released closer to the event date. Surface conditions at the Portuguese venue and recent tournament results from both players in April and early May will provide concrete data points. Fixture postponements due to weather or administrative issues occasionally occur on the Challenger circuit; the seven-day resolution window protects against minor delays but creates risk if either player withdraws unexpectedly after play begins.
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: Laslo Djere vs Gustavo Heide" 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.
$49 in lifetime turnover and $8K 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 $49 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 19 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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