National Bank Open: Terence Atmane vs Jakub Mensik

Platform comparison

Market context

Terence Atmane’s meeting with Jakub Menšík at the National Bank Open has been priced as a clear but not overwhelming Menšík lean, with the market sitting at 18% YES on Atmane despite most pre-match pricing pointing the other way. Public betting boards and prediction feeds have Menšík around 1.4–1.5 in decimal odds, while Atmane is generally nearer 2.7–3.0, which is consistent with a broad underdog view on the Frenchman.[3][9]

That sort of split is best read against the recent pattern in ATP hard-court markets: younger, higher-ranked servers can attract strong support when their hold numbers and first-serve points are trending well, but volatility remains high when a lower-ranked opponent has already navigated a few rounds. Comparable previews for this match also land on Menšík, with Tennis Tonic calling him the pick in straight sets and Dimers assigning him about a 64% win probability, which frames the current 18% as a contrarian Atmane price rather than a balanced coin flip.[2][14]

The main catalyst is simple: whether Menšík’s pre-match favourite status hardens into the live market once the match starts, or whether any late withdrawal, postponement, or interruption keeps the settlement rules in play. Flashscore listed the contest for 07/08/2026 15:00, and Tennis reports it as a Round 3 meeting in Montréal, so traders will be watching the official order of play and any in-session completion risk more than headlines elsewhere.[6][8]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks National Bank Open: Terence Atmane vs Jakub Mensik across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Election Predictions UK provide a 0%-fee route into the same order book.

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

What resolution source is used for elections?

Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

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 Election Predictions UK route into the same order book at 0% fees.

How fast do political markets react to news?

High-liquidity markets move within seconds to minutes. A Trump tweet on the economy can shift the "Trump 2024" market 2-5 points before mainstream media has written anything.

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.