National Bank Open: Jacob Fearnley vs Adrian Mannarino

Platform comparison

Market context

Polymarket prices this contract at **100% YES**, so the market is effectively implying Jacob Fearnley is already certain to advance against Adrian Mannarino on the outcome definition tied to the on-chain conditional token set. On Polymarket, USDC is posted on Polygon and the market resolves off the match result, with a delayed, cancelled, or unfinished contest handled by the settlement rules rather than by betting volume alone.

That is a very strong reading for a first-round ATP Masters 1000 match, and it needs context. Fearnley is the lower-ranked player in the matchup, with Yahoo’s event listing showing Mannarino at ATP 47 and Fearnley at ATP 110, while Tennis.com’s preview had Fearnley as a 61% projected winner rather than anything close to a lock[1][3]. The players also had no recorded head-to-head since 2022 in Tennis Majors’ database, so there is limited direct history to anchor a near-certain price[4]. In other words, a 100% market print is less a neutral model of tennis strength than an extreme position in the contract.

For traders, the main catalysts are operational rather than narrative: official tournament scheduling, whether the match is started or completed, and any late changes from Montreal’s draw or court allocation. Multiple live listings show the fixture as a Round of 128 match at Stade Iga / IGA Stadium on outdoor hard courts, but with differing local timestamps and live-score pages still showing it as upcoming[1][2][9]. If it is postponed beyond the market’s 7-day window without a winner, or abandoned after starting, settlement can shift to the market’s 50-50 fallback, so the relevant risk is not only who wins but whether play is actually completed on time.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Jacob Fearnley vs Adrian Mannarino 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

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.

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.