Resolution criteria on PolyGram: This market refers to the tennis match between Zsombor Piros and Jonas Forejtek in the Zagreb, originally scheduled for May 12, 2026 at 4:00AM ET. This market will resolve to 'Zsombor Piros' if Zsombor Piros advances against Jonas Forejtek. This market will resolve to 'Jonas Forejtek' if Jonas Forejtek advances against Zsombor Piros. 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
| Zagreb: Zsombor Piros vs Jonas Forejtek | 62% YES | 39% NO |
| Completed Match | 50% YES | 51% NO |
| Zagreb: Zsombor Piros vs Jonas Forejtek Match O/U 21.5 | 50% YES | 50% NO |
| Zagreb: Zsombor Piros vs Jonas Forejtek Total Sets: O/U 2.5 | 38% YES | 63% NO |
| Zagreb: Zsombor Piros vs Jonas Forejtek Set 1 O/U 8.5 | 74% YES | 26% NO |
| Zagreb: Zsombor Piros vs Jonas Forejtek Set 1 Winner | 58% YES | 42% NO |
| Zagreb: Zsombor Piros vs Jonas Forejtek Match O/U 22.5 | 45% YES | 56% NO |
| Zagreb: Zsombor Piros vs Jonas Forejtek Set 1 O/U 9.5 | 50% YES | 50% NO |
Zsombor Piros and Jonas Forejtek are scheduled to meet in Zagreb on 12 May 2026, with the match originally timed for 4:00 AM ET. The current order book on Polymarket prices Piros at 60% implied probability, reflecting modest favouring of the Hungarian player. Settlement occurs on 19 May 2026, allowing a seven-day window for completion; any cancellation, tie, or delay beyond that threshold resolves the market to 50-50.
Piros, ranked outside the top 200 on the ATP tour, has competed primarily on the Challenger circuit where consistency varies considerably. Forejtek, a Czech player with similar ranking trajectory, brings comparable experience at that level. Historical patterns in lower-tier ATP and Challenger matches show that home-court advantage—Piros competing in Zagreb—typically shifts probabilities by 5–8 percentage points, which aligns with the current 60–40 split. Both players have shown vulnerability to higher-ranked opponents but perform adequately against peers of equivalent standing.
Traders should monitor the official ATP schedule and any injury announcements in the week preceding 12 May, as both players' recent match records and physical condition often shift market pricing materially. Weather disruptions in Zagreb during May are infrequent but possible; the Adriatic coast occasionally experiences rain that could delay proceedings. Court surface preference—Piros's record on clay versus Forejtek's performance—warrants checking recent tournament results if either player has competed on similar surfaces in the preceding weeks.
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: Zsombor Piros vs Jonas Forejtek" 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.
$4K in lifetime turnover and $52K of resting liquidity puts this market in the below the median by volume for tennis contracts on PolyGram. Order-book depth is strong — order books support five-figure trades with single-cent slippage.
Last 24 hours alone saw $4K 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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