Resolution criteria on PolyGram: This market refers to the tennis match between Deborah Chiesa and Camila Osorio in the Parma, originally scheduled for May 12, 2026 at 5:00AM ET. This market will resolve to 'Deborah Chiesa' if Deborah Chiesa advances against Camila Osorio. This market will resolve to 'Camila Osorio' if Camila Osorio advances against Deborah Chiesa. 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
| Parma: Deborah Chiesa vs Camila Osorio | 8% YES | 93% NO |
| Completed Match | 50% YES | 50% NO |
| Parma: Deborah Chiesa vs Camila Osorio Total Sets: O/U 2.5 | 54% YES | 47% NO |
| Parma: Deborah Chiesa vs Camila Osorio Set 1 O/U 8.5 | 49% YES | 51% NO |
| Parma: Deborah Chiesa vs Camila Osorio Match O/U 21.5 | 50% YES | 50% NO |
| Parma: Deborah Chiesa vs Camila Osorio Set 1 Winner | 52% YES | 48% NO |
| Parma: Deborah Chiesa vs Camila Osorio Match O/U 22.5 | 50% YES | 50% NO |
| Parma: Deborah Chiesa vs Camila Osorio Set 1 O/U 9.5 | 50% YES | 50% NO |
Deborah Chiesa and Camila Osorio are scheduled to meet in the opening rounds of the Parma WTA event on 12 May 2026. The current order book on Polymarket prices Chiesa's advancement at 8%, implying Osorio is heavily favoured at 92%. This probability reflects the substantial gap in recent form and ranking between the two players, with Osorio ranked significantly higher on the WTA circuit and possessing a more consistent record in 2025–2026 competition.
Chiesa, an Italian player competing on home soil, carries the traditional home-court advantage that occasionally shifts outcomes in early-round WTA matches. However, historical precedent suggests that ranking differentials of this magnitude rarely reverse in best-of-three formats. Osorio's superior seeding and recent tournament performances have established her as the clear favourite in comparable matchups, and the 8% probability assigned to Chiesa reflects the mathematical unlikelihood of an upset rather than dismissing her chances entirely.
Traders should monitor injury reports and practice schedules in the week preceding 12 May, as any withdrawal or fitness concerns could trigger the 50-50 resolution clause. Weather disruptions at the Parma venue could also delay proceedings beyond the seven-day threshold. Osorio's recent results in clay-court tournaments will be the primary catalyst affecting the probability, as any unexpected losses or form dips in the fortnight before Parma could shift the implied odds. The settlement window closes on 19 May at 09:00 UTC, allowing a one-week buffer for match completion.
This market settles from the official outcome published at https://www.wtatennis.com/scores. 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 "Parma: Deborah Chiesa vs Camila Osorio" 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.
$345 in lifetime turnover and $11K of resting liquidity puts this market in the below the median by volume for tennis contracts on PolyGram. Order-book depth is modest — expect a couple of cents of slippage on $1k+ trades.
Last 24 hours alone saw $345 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.wtatennis.com/scores. 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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