Resolution criteria on PolyGram: This market refers to the doubles tennis match between Montsi/Schalkwyk and Castelnuovo/Hsu in the Centurion, originally scheduled for May 26, 2026 at 4:00AM ET. This market will resolve to 'Montsi/Schalkwyk' if the team of Montsi/Schalkwyk advances against Castelnuovo/Hsu. This market will resolve to 'Castelnuovo/Hsu' if the team of Castelnuovo/Hsu advances against Montsi/Schalkwyk. 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
| Completed Match | 100% YES | 0% NO |
| Centurion (Doubles): Montsi/Schalkwyk vs Castelnuovo/Hsu | 100% YES | 0% NO |
The Centurion doubles draw features Montsi and Schalkwyk against Castelnuovo and Hsu, with the match originally scheduled for 26 May 2026. The current order book on Polymarket reflects a 100% implied probability for Montsi/Schalkwyk, indicating the market has priced them as near-certain winners. This extreme probability typically emerges when one pairing holds a substantial seeding advantage, ranking differential, or recent head-to-head record that traders view as decisive. The settlement window closes on 2 June 2026, allowing a seven-day buffer beyond the original match date before the market defaults to 50-50 if no result is determined.
Doubles pairings at ATP 250 events like Centurion often reflect recent partnership stability and combined ranking strength. Montsi and Schalkwyk's positioning at the top of the order book suggests they either carry higher combined rankings or have demonstrated superior recent form in doubles play compared to Castelnuovo and Hsu. Historical precedent shows that when seeding gaps exceed approximately 200 ranking points combined, implied probabilities frequently exceed 85%; the current 100% reading indicates traders perceive an even larger performance gap or view the pairing matchup as particularly unfavourable for the lower-ranked team.
Traders should monitor official ATP draw confirmations and any late withdrawals or substitutions, which occasionally reshape doubles brackets. Weather delays at the Centurion venue could compress the schedule; the seven-day settlement window provides some protection against fixture congestion, but back-to-back rain days could still trigger the tie resolution clause. Partnership announcements or injury updates affecting either pairing would shift the order book materially from its current extreme position.
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 "Centurion (Doubles): Montsi/Schalkwyk vs Castelnuovo/Hsu" 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.
$5 in lifetime turnover and $0 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 2 June 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.
Explore more prediction market odds and trading opportunities on PolyGram: