Resolution criteria on PolyGram: This market refers to the tennis match between Valentina Ivanov and Sapfo Sakellaridi in the ITF Women Bol, originally scheduled for May 28, 2026 at 4:00AM ET. This market will resolve to 'Valentina Ivanov' if Valentina Ivanov advances against Sapfo Sakellaridi. This market will resolve to 'Sapfo Sakellaridi' if Sapfo Sakellaridi advances against Valentina Ivanov. 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
| ITF Bol: Valentina Ivanov vs Sapfo Sakellaridi | 100% YES | 0% NO |
| Completed Match | 100% YES | 0% NO |
Valentina Ivanov and Sapfo Sakellaridi are scheduled to compete in the ITF Women's tournament in Bol, Croatia on 28 May 2026. The match represents a lower-tier professional tennis fixture on the ITF circuit, where both players typically compete for ranking points and prize money. The current order book on Polymarket reflects a 100% implied probability for Ivanov's advancement, suggesting either substantial backing for her prospects or minimal liquidity depth at the current price.
ITF Women's matches at this level carry historical completion rates above 95%, with walkovers and cancellations remaining uncommon except in cases of acute injury or severe weather. Sakellaridi and Ivanov's respective rankings and recent form on the ITF circuit would normally inform probability assessment, though public match records for lower-ranked players can be sparse. The settlement window extends to 4 June 2026, providing a five-day buffer beyond the scheduled date to accommodate minor delays typical of regional tournaments.
Traders should monitor tournament draw confirmations and any player injury announcements in the weeks preceding the event. Bol's coastal location in May presents minimal weather risk historically, though scheduling changes occasionally occur at ITF events. The extreme probability skew suggests limited market participation; substantial backing for Sakellaridi at current odds would require either newly available information about player form or recognition of mispricing in the order book's depth.
The International Tennis Federation (ITF) designates a World Champion each year based on its own majority opinion of performances throughout the year, emphasizing the Grand Slam tournaments, and also considering team events such as the Davis Cup and Fed Cup. Men's and women's singles champions were first named in 1978; the title is now also awarded for doubl
The 2026 International Tennis Federation (ITF) Women's World Tennis Tour is the entry-level and mid-level tour for women's professional tennis. It is organized by the International Tennis Federation and is a tier below the WTA Challenger series of the Women's Tennis Association (WTA) Tour. The Tour provides a professional pathway between the ITF Junior World
The 2016 International Tennis Federation (ITF) Women's Circuit is a second-tier tour for women's professional tennis. It is organized by the International Tennis Federation and is a tier below the Women's Tennis Association (WTA) Tour. The ITF Women's Circuit includes tournaments with prize money ranging from $10,000 to $100,000.
The 2024 International Tennis Federation (ITF) Women's World Tennis Tour was the entry-level and mid-level tour for women's professional tennis. It was organized by the International Tennis Federation and was a tier below the WTA Challenger series of the Women's Tennis Association (WTA) Tour. The Tour provided a professional pathway between the ITF Junior Wo
This market settles from the official outcome published at https://www.itftennis.com/en/tournament-calendar/. 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 "ITF Bol: Valentina Ivanov vs Sapfo Sakellaridi" 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.
$1K 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.itftennis.com/en/tournament-calendar/. 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 4 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.
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