National Bank Open: Jacob Fearnley vs Jakub Mensik

Platform comparison

Market context

Jacob Fearnley is due to face Jakub Menšík in the National Bank Open, with the market currently assigning Fearnley a 18% chance despite Menšík being the clear betting favourite in pre-match pricing. Match-level data support that split: there is no prior head-to-head, but Menšík’s 2026 hard-court record is stronger than Fearnley’s, and he has the higher overall win rate across the past year as well as the higher ATP profile entering Montreal.[1][2][15][17]

That 18% line is best read against two comparable frames: first, a first-time meeting with no direct historical edge, and second, a gap that is meaningful but not overwhelming on hard courts. Fearnley has shown enough to stay competitive on the surface, while Menšík’s broader results and Masters-level pedigree — including a Miami title in 2025 referenced in match previews — explain why traders are leaning towards him rather than treating this as a coin flip.[5][13][15]

The main catalyst to watch is whether the scheduled second-round match actually starts on time and whether either player arrives with any late fitness or scheduling disruption, because settlement depends on a winner being advanced rather than just a completed draw slot. Live match listings across tennis coverage and score services indicate the fixture is active in the Montreal draw, but there is no head-to-head history to anchor a market move, so any shift is likely to come from draw updates, order-of-play changes, or a pre-match withdrawal rather than from legacy matchup data.[6][7][12][13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for National Bank Open: Jacob Fearnley vs Jakub Mensik plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

Political markets typically settle on official candidate or agency confirmation. Polymarket uses UMA Optimistic Oracle: a proposer posts the outcome with a bond, the two-hour window opens, then the smart contract pays USDC.

Kalshi settles USD via CFTC clearinghouse, with clearly defined resolution sources (e.g. AP race calls for elections). Betfair settles after the official outcome is registered with the league or agency. Manifold is play-money.

UK Frequently Asked Questions

How accurate are political prediction markets?

Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

Which platform has the deepest political liquidity?

Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

Are political prediction markets legal in my country?

It varies. They sit in legal gray areas in most jurisdictions. Polymarket is geo-blocked from US/UK/EU; some broker frontends have a different geo footprint. Trade only with capital you can afford to lose, and only if you understand the legal status in your jurisdiction.

Why do Polymarket and Kalshi differ on elections?

Kalshi must follow CFTC compliance — strict definitions, clear resolution sources, US citizens only with KYC. Polymarket operates globally without CFTC oversight — deeper liquidity, but also higher regulatory risk.

Are UK election prediction markets available from the UK?

Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.