US Open, Qualification ATP: Tristan Schoolkate vs Seong-Chan Hong

Platform comparison

Market context

Tristan Schoolkate’s US Open qualifying match against Seong-Chan Hong was on the schedule for 26 August on Court 11, and the latest listings around the event still showed it as a live or upcoming second-round qualifying fixture rather than a completed result. The market’s 91% YES price therefore points to an expectation that Schoolkate progresses, but it also leaves some room for late-court or schedule risk if the match is delayed beyond the settlement window.

The main historical frame is straightforward: qualifying markets at Slams often move hard once a player has already cleared the opening round and the draw confirms the next opponent. Schoolkate beat Jack Secord in round one, while Hong came through a tight first-round match against Nikoloz Basilashvili, so both entered with recent hard-court match practice and no obvious head-to-head edge from the draw itself. Tennis models and pre-match odds published on the day leaned to Schoolkate, but not overwhelmingly, which is consistent with a market that is well above coin-flip yet still sensitive to live information.

Traders should watch for any official update to the qualifying schedule, because US Open qualifying is played on a compressed timetable and postponements can push resolution risk into the settlement window. The key catalysts are whether the match is completed, whether either player withdraws before play, and whether the scoreline is posted by the tournament feeds and scoreboards that were tracking the fixture on 26 August. If the match is not played or no winner is confirmed by the deadline, the market would settle at 50-50 instead of to either player.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Prediction Today. 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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.