National Bank Open: Jacob Fearnley vs Adrian Mannarino

Platform comparison

Market context

Jacob Fearnley is due to face Adrian Mannarino in the National Bank Open first round on outdoor hard courts in Montreal, with the market resolving on who actually advances rather than on pre-match pricing alone.[1][2] The current 100% crowd-implied YES for Fearnley is best read as a near-certain programme of the schedule rather than a live win probability: in practice, a completely one-sided market usually means the contract is already effectively settled by a confirmed result, or the feed is reflecting that the match has completed with Fearnley moving on.[1][2][5]

For comparison, the underlying tennis signals before play were much less absolute. Fearnley entered as the lower-ranked player at ATP 110 against Mannarino at ATP 47, but several previews and price screens still leaned towards Fearnley, with one major listing showing him as a 61% projected winner and others putting him around 1.56–1.58 in decimal odds; head-to-head data also showed Fearnley leading 1-0, with their previous meeting on hard courts won in straight sets by the Briton.[2][4][12][13][15] That mix explains why programmatic traders typically model this sort of event as a binary match-resolution contract with a large exogenous cancellation branch: the important distinction is not who looked favoured, but whether the match was played to completion inside the settlement window.[1]

The practical catalysts to monitor are order-of-play updates, court assignment changes, and any weather or suspension notices from the tournament and broadcasters, because a postponed or interrupted first-round match can change the resolution path without changing the matchup itself.[1][8][9][14] As of the live listings, the fixture was being carried as an upcoming or on-now match across tennis data and broadcast pages, which is the key check for anyone wiring conditional orders or bots around a stale 100% print: if the status flips from scheduled to started, the market usually becomes a straight watch on completion, whereas a no-play or long delay pushes it towards the tie framework instead.[2][6][8][9]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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 Kalshi Fees. 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.

Do I need to KYC for this market?

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

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.