National Bank Open: Jacob Fearnley vs Adrian Mannarino

Platform comparison

Market context

Jacob Fearnley’s match with Adrian Mannarino in Montréal has been priced by the market as a near-certainty, with the crowd implying **100% YES** on Fearnley. That is much stronger than the wider tennis consensus, which appears to lean Fearnley but still leaves Mannarino a live underdog: Tennis.com’s model had Fearnley at 61% and Mannarino at 39%, while other previews also listed Fearnley as the favourite rather than a lock.[3][12][14]

For handicapper context, that gap matters because this is not a profile where one player is obviously priced out by class or conditions. Fearnley is being treated as the more likely winner, but Mannarino brings enough ATP-level experience to keep the upset angle open if the match is competitive or drifts deep into sets.[2][10][12] Comparable first-round Masters-level matches often settle into a “favoured but not dominant” range rather than anything close to a sure thing, so a 100% market price looks vulnerable to correction if the trading crowd is simply following the headline favourite rather than the underlying win probabilities.[3][12]

The main catalysts are straightforward: whether the scheduled first-round match actually starts, whether it is moved on the order of play, and whether either player withdraws or the fixture is delayed beyond the market’s seven-day settlement buffer. Match listings on several tennis and scoreboard sites show it as an upcoming National Bank Open round-one meeting, but the live status can shift quickly with ATP scheduling and weather-driven changes in Montréal.[2][4][5][6] For traders, the contrarian angle is not that Mannarino is a strong pick, but that any delay, walkover risk or cancellation scenario would move the market away from a pure Fearnley win outcome and towards the tie-style settlement terms.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews National Bank Open: Jacob Fearnley vs Adrian Mannarino across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Who Will Win. 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.

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 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.