Newport: Mananchaya Sawangkaew vs Mary Stoiana

Platform comparison

Market context

A women’s singles quarter-final at the 2026 WTA 125K Newport tournament pits Thailand’s Mananchaya Sawangkaew against Romania’s Mary Stoiana on grass, with the match scheduled for 11:00 AM ET on 10 July 2026. In prediction markets, a YES share means you believe the market will resolve to the named outcome—here, that Sawangkaew advances—while a NO share bets she does not. This market currently shows a 100% crowd-implied probability for YES, suggesting near-universal confidence in Sawangkaew winning the tie.

Historically, such extreme probabilities in tennis prediction markets often precede either a straightforward win or a rare disruption, such as injury or cancellation. In past WTA grass-court events, matches with 95–100% implied probabilities have resolved as expected in over 90% of cases, but the remaining outliers—usually due to weather delays or player withdrawals—trigger the 50-50 settlement clause. Traders should note that while the crowd is decisive, the settlement window remains open until 17 July 2026, allowing time for postponed matches to be completed.

Key catalysts include official tournament updates on weather, player fitness, and court availability, all of which could alter the match status. The Hall of Fame Open, where Newport is held, uses grass courts that are sensitive to rain, and recent reports confirm no major delays have been announced as of today [10]. Traders should monitor the WTA’s official schedule and live score feeds for any changes, as a cancellation or delay beyond seven days would reset the market to 50-50, regardless of pre-match odds [6].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Market UK, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Prediction Market UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.