Resolution criteria on PolyGram: This market refers to the tennis match between Eduardo Ribeiro and Murkel Dellien in the Cordoba, originally scheduled for May 13, 2026 at 9:00AM ET. This market will resolve to 'Eduardo Ribeiro' if Eduardo Ribeiro advances against Murkel Dellien. This market will resolve to 'Murkel Dellien' if Murkel Dellien advances against Eduardo Ribeiro. 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
| Cordoba: Eduardo Ribeiro vs Murkel Dellien | 50% YES | 50% NO |
| Completed Match | 50% YES | 50% NO |
Eduardo Ribeiro and Murkel Dellien are scheduled to meet in the Cordoba tournament on 13 May 2026. The match represents a mid-tier ATP Challenger fixture where both players compete regularly on the South American clay circuit. Ribeiro, a Brazilian left-hander, has shown inconsistent form across lower-tier events, whilst Dellien, a Bolivian player, has established himself as a consistent performer on clay courts. The current order book on Polymarket reflects a 50-50 split, suggesting traders perceive the matchup as genuinely competitive with no clear technical or form advantage discernible at present.
Historical head-to-head records between players at this level often shift based on recent tournament results and surface-specific performance. Both Ribeiro and Dellien have competed extensively on clay, their preferred surface, which typically favours consistency over explosive power. Recent Challenger results from early 2026 would be the primary reference point for assessing current form, though such matches often hinge on momentum from qualifying rounds and draw positioning rather than pre-match rankings alone.
Traders should monitor tournament draws and any schedule adjustments announced closer to the event date. Injury reports or late withdrawals from either player would trigger immediate repricing. The settlement window extends to 20 May, providing a seven-day buffer beyond the scheduled match date; any delays beyond that threshold would trigger a 50-50 resolution. Weather disruptions on clay courts in Cordoba during May are a secondary consideration, though unlikely to prevent completion entirely.
Eduardo José Corona was a Portuguese footballer who played as forward.
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 "Cordoba: Eduardo Ribeiro vs Murkel Dellien" 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 $996 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 20 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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