National Bank Open: Jacob Fearnley vs Jakub Mensik

Platform comparison

Market context

Jacob Fearnley’s meeting with Jakub Mensik in Montreal is a straightforward first-look case for a trader building a model or rules-based entry: there is no recorded head-to-head, so the market has to lean on form, surface splits, and player-level priors rather than matchup history.[1][3][9] The live pricing context also fits that read, with third-party odds making Mensik the clear favourite and Fearnley a much longer shot, while crowd-implied 0% YES indicates the contract is currently being treated as effectively dead.[18]

Comparable cases between an ATP top-20-calibre hard-court player and a lower-ranked opponent usually move on three inputs: whether the favourite is confirmed to start, whether the match actually begins on time, and whether any schedule reshuffle creates a settlement edge for 50-50 outcomes under the no-winner rules. Mensik’s recent results are materially stronger overall and on hard courts than Fearnley’s, with one source putting Mensik at 61.43% career wins and 64.13% on hard, versus Fearnley at 40.38% career wins and 34.62% on hard.[3]

For programme-style monitoring, the key catalysts are the official draw sheet, any same-day court-time updates, and whether the match is moved far enough from the original slot to affect the seven-day settlement clock. As a practical matter, conditional orders or bot rules should watch for confirmed walkovers, withdrawals, and completed scorelines, because the market resolves to the advancing player only if the match is actually played to a winner; otherwise it can fall back to 50-50 under the cancellation and delay language.[9][16]

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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.

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 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.