National Bank Open: Arthur Fils vs Cameron Norrie

Platform comparison

Market context

Polymarket’s contract is pricing **Arthur Fils** at about **69%** and **Cameron Norrie** at about **31%**, which is close to the wider sportsbook and model consensus for this National Bank Open round-of-16 match.[4][6][15] For a Polymarket user, the relevant point is the on-chain settlement: positions are held in USDC on Polygon, and the conditional token resolves to the player who advances; if the match is not played or is left unresolved beyond the contract’s timetable, the market can fall back to a 50-50 outcome under the published rules.[11]

That price fits the pre-match framing from tennis models and bookmakers, which mostly make Fils the favourite rather than a runaway lock.[1][2][3][6] Tennis Tonic and Tennis.com both lean towards Fils, while a head-to-head Elo model also gives him the stronger win chance, though not by a massive margin.[1][3][6] The market is therefore reading as a fairly ordinary favourite position rather than a strong mismatch, with some room for movement if the first set or early schedule news changes the live view.[4][5]

The main catalysts are practical, not abstract: confirmed start time, court assignment, weather, and whether the match begins on schedule, because any delay or interruption matters for a contract that settles on advancement rather than scoreline.[2][5][7][8] The listed start times vary slightly across venues and feeds, which is typical for tennis scheduling and is exactly the sort of thing traders watch when deciding whether a price should compress towards the favourite or drift on uncertainty.[2][7][8]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Arthur Fils vs Cameron Norrie across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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 Scam?. 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%.