National Bank Open: Arthur Fils vs Cameron Norrie

Platform comparison

Market context

Arthur Fils and Cameron Norrie are set to meet at the National Bank Open in Montréal, with the market leaning towards Fils but not overwhelmingly so. The crowd-implied probability on this contract is **69%** for Fils, which sits close to Tennis.com’s **68%** projected win chance and a Tennis Tonic price profile of roughly **1.43** on Fils versus **2.81** on Norrie, while BetUS posted a similar moneyline at **-260/+210**.[7][1][2]

That places the prediction market broadly in line with the main pre-match pricing, but not as bullish as the more aggressive computer-style models. String Tension’s Elo-based read is **73.9%** for Fils, and it translates that into implied odds of about **-283**; by contrast, Tennistemple’s community prediction data is much more lopsided at **91.5%** for Fils, though that is clearly a fan-vote rather than a bookmaker line.[5][4] The useful comparison for traders is that the market is near the centre of the available range rather than pricing a true outlier.

For traders, the main catalysts are straightforward: final confirmation that the match is actually played on schedule, any order-of-play changes, and whether the matchup starts before the settlement window closes. Flashscore listed the fixture for **10/08/2026 01:30**, which underlines the importance of checking local start times and any ATP scheduling shifts, while Tennis.com still had the round-four pairing live on its tournament page.[8][7] Because this contract resolves to **50-50** if the match is cancelled, tied, or delayed by more than seven days without a winner, any weather, withdrawal, or tournament scheduling announcement is more relevant here than in a standard straight-winner market.[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.

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 Best Prediction Markets. 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 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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.