National Bank Open: Zachary Svajda vs Arthur Fils

Platform comparison

Market context

Arthur Fils v Zachary Svajda is priced by the crowd at **0% YES**, so the market is effectively treating the wrong-side outcome as the base case for now. The live tennis data paints a very different hierarchy: independent model and ratings pages have Fils around the mid-to-high 70s in win probability, with one Elo feed at **76.9%** and another at **77%**, while head-to-head records remain **0–0** because they have not played each other before.[2][16][1]

That makes Fils the clear favourite on paper, with Svajda the underdog and the more obvious contrarian angle only if the market has overreacted to incomplete scheduling or stale assumptions. Fils also brings the stronger 2026 body of work, shown at **23–9** on one stats feed versus Svajda’s **8–11**, while Svajda’s deeper route to value is usually through serving numbers and a shorter-format upset rather than any historical edge.[2][15] Comparable first-time meetings between a higher-ranked ATP regular and a lower-ranked challenger profile typically price close to model consensus once the draw and surface are confirmed, so the current **0%** looks detached from the tennis inputs rather than a signal of genuine parity.[12][16]

The main catalysts are straightforward: whether the match is still on the order of play, whether either player withdraws, and whether any postponement pushes it beyond the market’s seven-day settlement window, which would force the 50-50 rule rather than a straight win settlement. The fixture is listed as a National Bank Open second-round match in Montréal on 5 August 2026, with live match pages active across major scoreboards, so traders should watch for official tournament updates and any change in court assignment or start time.[9][5][6][12]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Zachary Svajda vs Arthur Fils 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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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%.