National Bank Open: Rafael Jodar vs Arthur Fils

Platform comparison

Market context

Arthur Fils against Rafael Jodar in the National Bank Open is being priced as a close but Fils-favoured match-up, with the crowd-implied **54% YES** suggesting a modest lean rather than a strong conviction. That sits in the same general band as the more established pre-match pricing seen in earlier meetings, where Tennis Tonic had Fils around **1.58** and Jodar at **2.375** before their Washington meeting, implying a clearer sportsbook edge than the current market does now.[13] The pair have split their head-to-head at **1-1** across reported results, with Fils winning in Barcelona on clay and Jodar beating Fils in Washington on hard courts, which is a useful reminder that surface and recent form can move these contracts quickly.[1][8][12]

For context, this is the sort of market where a small swing in probability can matter more than the headline number. TennisStats and related match databases show Fils with the stronger overall tour profile and ranking-level pedigree, while Jodar has posted competitive hard-court numbers and has already taken one hard-court win in this rivalry, so a near-even market is not out of line with comparable data.[1][5][8] Analyst-style previews have not been unanimous either: Tennis Tonic’s prior pick still leaned Fils, but only by expecting a longer match, which underlines that consensus has been more about a narrow advantage than a mismatch.[13]

The main catalysts now are straightforward: confirm the official draw/status, because the market description says the original start time was 11 August and the settlement window runs to 18 August, so any postponement, retirement, or walkover could reshape the contract materially. Tennis.com is already listing the Montreal quarter-final pairing, which supports that the fixture is/was on the schedule, but traders should watch for late schedule movement, injury updates, and whether the match is actually completed rather than merely started.[9] If it is not played at all, or is delayed beyond seven days without a winner, the contract resolves to 50-50 under the stated rules.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Rafael Jodar 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 Best Prediction Markets 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.

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.

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.