Resolution criteria on PolyGram: This market refers to the doubles tennis match between Poljicak/Serdarusic and Goldhoff/Ingildsen in the Zagreb, originally scheduled for May 15, 2026 at 5:30AM ET. This market will resolve to 'Poljicak/Serdarusic' if the team of Poljicak/Serdarusic advances against Goldhoff/Ingildsen. This market will resolve to 'Goldhoff/Ingildsen' if the team of Goldhoff/Ingildsen advances against Poljicak/Serdarusic. 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): Poljicak/Serdarusic vs Goldhoff/Ingildsen | 70% YES | 31% NO |
| Completed Match | 50% YES | 50% NO |
| Zagreb (Doubles): Poljicak/Serdarusic vs Goldhoff/Ingildsen Match O/U 21.5 | 50% YES | 50% NO |
| Zagreb (Doubles): Poljicak/Serdarusic vs Goldhoff/Ingildsen Set 1 O/U 8.5 | 50% YES | 50% NO |
| Zagreb (Doubles): Poljicak/Serdarusic vs Goldhoff/Ingildsen Match O/U 22.5 | 50% YES | 50% NO |
| Zagreb (Doubles): Poljicak/Serdarusic vs Goldhoff/Ingildsen Set 1 O/U 9.5 | 50% YES | 50% NO |
| Zagreb (Doubles): Poljicak/Serdarusic vs Goldhoff/Ingildsen Match O/U 23.5 | 50% YES | 50% NO |
| Zagreb (Doubles): Poljicak/Serdarusic vs Goldhoff/Ingildsen Set 1 O/U 10.5 | 50% YES | 50% NO |
The Zagreb Doubles tournament will feature a match between the pairing of Poljicak and Serdarusic against Goldhoff and Ingildsen, originally scheduled for 15 May 2026. The current order book on Polymarket reflects a 70% implied probability favouring Poljicak/Serdarusic, suggesting the market views them as clear favourites in this encounter. The settlement window closes on 22 May, allowing a seven-day window for the match to be completed; any cancellation, tie, or delay beyond this period triggers a 50-50 resolution.
Poljicak and Serdarusic represent a Croatian pairing with home-court advantage at Zagreb, a factor historically significant in doubles tennis where familiarity with court conditions and crowd support can influence momentum. Comparable ATP 250 doubles draws show that home pairings typically command 5–15 percentage point probability premiums, though this varies considerably based on the relative rankings and recent form of opposing teams. The 70% probability suggests the market is pricing in both the home advantage and an assessment of relative playing strength.
Traders should monitor official tournament draws and any late withdrawals, which remain possible until match day. Weather conditions at Zagreb in mid-May could affect court speed and play style, potentially favouring one pairing's strengths over another. Recent injury reports or changes in player availability would represent material catalysts; the ATP's official website and tournament organisers typically announce such developments within 48 hours of scheduled 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 "Zagreb (Doubles): Poljicak/Serdarusic vs Goldhoff/Ingildsen" 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 $203 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 22 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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