Resolution criteria on PolyGram: This market refers to the doubles tennis match between Dias/Silva and Bianchi/Sheehy in the Zagreb, originally scheduled for May 14, 2026 at 4:00AM ET. This market will resolve to 'Dias/Silva' if the team of Dias/Silva advances against Bianchi/Sheehy. This market will resolve to 'Bianchi/Sheehy' if the team of Bianchi/Sheehy advances against Dias/Silva. 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
| Zagreb (Doubles): Dias/Silva vs Bianchi/Sheehy | 50% YES | 50% NO |
| Completed Match | 50% YES | 51% NO |
The Zagreb doubles draw will feature the pairing of Dias and Silva against Bianchi and Sheehy in what is currently priced at even odds on Polymarket's order book. The match was originally scheduled for 14 May 2026 at 04:00 ET, with settlement occurring by 21 May. The 50% implied probability reflects genuine uncertainty between two competitive pairings, though the market has yet to see significant volume that would typically sharpen pricing around established form or recent results.
Comparable ATP 250 doubles matches in the spring season historically show that unseeded or lower-ranked pairings often trade near parity when neither team has established dominance on clay courts. The current probability aligns with markets where both teams possess similar ranking profiles or recent tournament performance. If either pairing had recent wins at comparable events or clear ranking advantages, the market would typically show skew beyond 50-50. The settlement window's seven-day buffer provides reasonable protection against scheduling delays common in European spring tournaments.
Traders should monitor official ATP communications regarding the Zagreb tournament draw confirmation, any late withdrawals from either pairing, and recent results from warm-up events in April 2026. Surface preference becomes material for doubles on clay, particularly regarding serve-and-volley tendencies versus baseline strength. Injury announcements affecting either player would shift the order book materially. The early morning scheduling (04:00 ET) may also affect liquidity patterns as European traders engage during their morning hours.
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 "Zagreb (Doubles): Dias/Silva vs Bianchi/Sheehy" 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.
$0 in lifetime turnover and $73 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.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 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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