Resolution criteria on PolyGram: This market refers to the tennis match between Shuai Zhang and Himeno Sakatsume in the Paris, originally scheduled for May 12, 2026 at 4:00AM ET. This market will resolve to 'Shuai Zhang' if Shuai Zhang advances against Himeno Sakatsume. This market will resolve to 'Himeno Sakatsume' if Himeno Sakatsume advances against Shuai Zhang. 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
| Paris: Shuai Zhang vs Himeno Sakatsume | 55% YES | 46% NO |
| Completed Match | 50% YES | 50% NO |
| Paris: Shuai Zhang vs Himeno Sakatsume Total Sets: O/U 2.5 | 65% YES | 35% NO |
| Paris: Shuai Zhang vs Himeno Sakatsume Set 1 Winner | 55% YES | 46% NO |
| Paris: Shuai Zhang vs Himeno Sakatsume Set 1 O/U 8.5 | 50% YES | 50% NO |
| Paris: Shuai Zhang vs Himeno Sakatsume Match O/U 22.5 | 50% YES | 50% NO |
| Paris: Shuai Zhang vs Himeno Sakatsume Set 1 O/U 9.5 | 69% YES | 31% NO |
| Paris: Shuai Zhang vs Himeno Sakatsume Match O/U 23.5 | 50% YES | 50% NO |
Shuai Zhang, the Chinese former world number five, faces Himeno Sakatsume, a Japanese player ranked significantly lower, in an early-round match at Roland Garros scheduled for 12 May 2026. The current order book on Polymarket prices Zhang's advancement at 33 per cent implied probability, reflecting substantial backing for Sakatsume despite the ranking disparity. Settlement occurs on 19 May, allowing a week for completion or rescheduling before resolution triggers.
Zhang's career trajectory provides context for reading this probability. Once a top-10 regular with a French Open quarter-final appearance in 2014, she has experienced significant ranking volatility in recent years, with injuries and inconsistent form limiting her clay-court performances. Sakatsume, conversely, represents the type of emerging challenger who has shown improvement on European clay circuits. Historical matchups between established players and rising competitors at Grand Slams often reflect genuine competitive uncertainty rather than pure ranking gaps, particularly when the favourite carries injury history or form concerns.
Traders should monitor Zhang's fitness status and recent tournament results through May, as any withdrawal or late scratches would trigger the 50-50 resolution clause. Court assignments and weather conditions at Roland Garros may also shift match dynamics—early morning scheduling (4:00 AM ET) could favour different playing styles. Sakatsume's recent WTA or ITF results and any coaching changes warrant attention, as momentum entering the tournament significantly influences first-round outcomes. The settlement window's seven-day buffer means delays beyond 19 May would force a split resolution regardless of match status.
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 "Paris: Shuai Zhang vs Himeno Sakatsume" 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 $8K 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.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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