Resolution criteria on PolyGram: This market refers to the doubles tennis match between Cukierman/Kestelboim and Grevelius/Heinonen in the Heilbronn, originally scheduled for June 2, 2026 at 4:00AM ET. This market will resolve to 'Cukierman/Kestelboim' if the team of Cukierman/Kestelboim advances against Grevelius/Heinonen. This market will resolve to 'Grevelius/Heinonen' if the team of Grevelius/Heinonen advances against Cukierman/Kestelboim. 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
| Heilbronn (Doubles): Cukierman/Kestelboim vs Grevelius/Heinonen | 47% YES | 54% NO |
| Completed Match | 50% YES | 50% NO |
The Heilbronn doubles draw will feature Cukierman and Kestelboim against Grevelius and Heinonen in a second-round encounter originally scheduled for 2 June 2026. The match sits at an even 50% implied probability on Polymarket's order book, reflecting genuine uncertainty between two pairings with limited recent head-to-head data at this level. The settlement window closes on 9 June, allowing a seven-day buffer for scheduling adjustments or delays before the market defaults to 50-50 resolution.
Heilbronn is a mid-tier ATP 250 event on grass, where doubles draws typically feature a mix of established pairs and rising combinations. Cukierman and Kestelboim have competed sporadically as a pairing, whilst Grevelius and Heinonen represent a less prominent combination on the professional circuit. The current probability distribution suggests the market has limited historical precedent to anchor on; comparable grass-court doubles matches at this tier often see tighter seeding advantages reflected in pricing, but without clear ranking differentials here, the 50-50 split indicates genuine parity in trader assessment.
Key variables include official draw confirmation and any late withdrawals, which typically emerge in the week preceding the event. Grass-court conditions at Heilbronn can favour serve-dominant players, potentially benefiting whichever pairing holds a net-point advantage. Traders should monitor ATP official announcements for seeding assignments and any injury updates affecting the players involved, as these factors often shift probability in the final days before play.
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 "Heilbronn (Doubles): Cukierman/Kestelboim vs Grevelius/Heinonen" 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.
$25 in lifetime turnover and $2 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 $2 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 9 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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