Winston-Salem Open: Raphael Collignon vs Rinky Hijikata

Platform comparison

Market context

Raphael Collignon’s meeting with Rinky Hijikata at Winston-Salem opened with the Belgian as a narrow sportsbook favourite, while the prediction market sat at 0% YES, leaving a clear gap between exchange sentiment and bookmaker pricing. Across the available lines, Collignon was generally around the low-to-mid 50s in implied win probability, with Hijikata priced as a live underdog rather than a long shot; that is much closer to a coin flip than the market contract suggests.

That spread matters because tennis pricing in ATP 250 events often moves quickly on draw position, seed status and any late fitness news. Collignon entered as the No. 5 seed and world No. 38, with Hijikata lower-ranked but not out of place on hard courts, which explains why bookmakers kept the match competitive rather than one-sided. A 0% contract reading can be overstated when the underlying match is simply unplayed or delayed, because settlement here depends on the match result being formally recorded by the window deadline.

The main catalysts are operational rather than narrative: whether the match is rescheduled into the Winston-Salem draw, whether either player withdraws, and whether the event’s order of play pushes the fixture beyond the original slot. The tournament schedule listed Collignon versus Hijikata on Court 4 in the round of 32, so any postponement, walkover or retirement would be the key driver for the contract rather than a broad form story.

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 Best Prediction Markets UK, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

UK Frequently Asked Questions

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 Best Prediction Markets 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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 are the best prediction markets for UK traders in 2026?

For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.