National Bank Open: Zachary Svajda vs Arthur Fils

Platform comparison

Market context

Arthur Fils against Zachary Svajda is a second-round ATP Masters 1000 match in Montréal, and the market is pricing it as an extreme mismatch: the crowd-implied probability is 0% YES, while mainstream match previews and model-based odds are heavily towards Fils. Tennis.com lists Fils at ATP No. 24 and Svajda at No. 87, which lines up with the wider market view that the Frenchman is the clear favourite even though the contract is binary on who *advances*, not on set score or margin.[11][16]

The historical frame is straightforward: there is no prior head-to-head, so traders are leaning more on ranking, surface record and seasonal form than on any direct matchup evidence.[1][2][9] Comparable preseason-style pricing gaps in ATP events usually compress once the underdog is a proven hard-court performer, but the available data still points the other way here. Fils has a much stronger 2026 record and a markedly higher hard-court win rate across recent samples, while Svajda’s best numbers are on hard courts but from a smaller, weaker overall baseline.[1][2][5] That is consistent with Tennis Tonic’s published odds of 1.31 for Fils and 3.44 for Svajda, and String Tension’s Elo model giving Fils about a 76.9% win chance.[2][16]

The main catalysts are scheduling and official draw status. The match was originally set for 6 August 2026 at 10:00am ET, so any late withdrawal, walkover, or rescheduling matters because this contract settles to 50-50 if the match is not played, ends tied, or is delayed beyond seven days without a winner.[9] Live-score listings from Flashscore and Sofascore show the fixture as active, which suggests the principal risk is not market doubt about the favourite, but execution risk around whether the match actually starts and completes as scheduled.[4][6][8]

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

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'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.

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.

What are the best prediction markets for UK traders in 2026?

For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.