Resolution criteria on PolyGram: This market refers to the tennis match between Anastasia Zakharova and Katie Boulter in the Paris, originally scheduled for May 13, 2026 at 5:30AM ET. This market will resolve to 'Anastasia Zakharova' if Anastasia Zakharova advances against Katie Boulter. This market will resolve to 'Katie Boulter' if Katie Boulter advances against Anastasia Zakharova. 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
| Paris: Anastasia Zakharova vs Katie Boulter | 35% YES | 66% NO |
| Completed Match | 50% YES | 50% NO |
A first-round match between Anastasia Zakharova and Katie Boulter is scheduled for the Paris clay courts on 13 May 2026. The current order book on Polymarket prices Boulter's advancement at 67%, implying Zakharova at 33%. This probability reflects Boulter's established ranking and experience on the WTA tour against Zakharova, a player with considerably less tour-level exposure and fewer high-profile victories on clay.
Boulter has demonstrated consistent performance on European clay in recent seasons, regularly reaching latter stages of WTA 500 and 1000 events. Zakharova's record against comparable opponents suggests she enters as the underdog, though clay-court specialists with strong baseline games occasionally produce upset results in early rounds. Historical precedent shows that first-round matches involving lower-ranked players can swing significantly on surface preference and recent form—players ranked outside the top 100 have upset top-50 opponents in approximately 15–20% of such matchups over the past three seasons.
Traders should monitor both players' performances in the weeks preceding the match, particularly results from warm-up events in late April and early May. Any withdrawal announcements, injury disclosures, or significant ranking shifts would alter the probability materially. The settlement window extends to 20 May, allowing seven days beyond the scheduled date for completion; matches abandoned or unfinished beyond that threshold resolve to 50-50, creating a tail risk that should factor into position sizing.
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: Anastasia Zakharova vs Katie Boulter" 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.
$2K 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.
Last 24 hours alone saw $2K 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 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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