National Bank Open: Arthur Fils vs Cameron Norrie

Platform comparison

Market context

Arthur Fils meets Cameron Norrie in the National Bank Open round of 16, with the market pricing Fils as the clear favourite. The crowd-implied probability of 70% is close to sportsbook and model views, with listed moneyline prices around Fils -240 to -260 and projected-win estimates near 68-74% from Tennis.com, Tennis Tonic and String Tension.[2][5][7][15]

For a programme or bot, the cleanest way to read this market is as a winner-only binary until the official result is posted: the settlement follows who advances, while a match not played, tied, or delayed beyond seven days resolves 50-50. Comparable pricing on Polymarket’s own Fils market also sits near 71%, which suggests the current line is broadly aligned rather than an obvious misprice, though live tennis markets can move quickly if the draw, start time or retirement risk changes.[3][12]

The main catalysts are operational rather than structural: confirm that the match actually starts at the listed Montreal slot, then watch for withdrawals, walkovers, weather delays and any live retirement news once play begins. Tennis.com lists the match as “coming up” on Tennis Channel, while odds boards and match listings on BetUS, Flashscore and TennisTemple show the scheduled round-of-16 timing; if you are automating around this market, those are the points where conditional orders or alerting logic matter most.[2][6][7][10]

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 Polymarket Bot 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 Polymarket Bot 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.

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%.