National Bank Open: Terence Atmane vs Jakub Mensik

Platform comparison

Market context

Polymarket is pricing this contract at **16% YES** for Terence Atmane to advance, which implies the market still sees **Jakub Mensik** as the clear favourite on the YES/NO contract settled in USDC on Polygon through conditional tokens. That is materially below the broad bookmaker and model range in the live tennis market, where Mensik is generally priced as the likely winner and Atmane as the underdog, so the current on-chain price is leaning to a low-probability upset rather than a coin-flip outcome.[1][2][9][15][4]

The historical read is straightforward: markets like this tend to sit near the pre-match moneyline consensus unless there is late team-news, an injury cue, or a scheduling change. Here, Mensik’s ranking profile and the published odds around him point to a stronger baseline, while Atmane’s path to a payout depends on either a straight win or a walkover-type advancement under the market rules. Comparable pre-match tennis contracts with a favourite in the low-1.40s to low-1.50s range usually leave the underdog in the teens to low-30s on event contracts, so 16% is consistent with a market that expects Mensik to progress but recognises a live upset chance.[1][2][9][19]

For traders, the main catalysts are the official ATP match status, any revised start time, and whether the contest is actually completed, since cancellation, a tie, or a delay beyond seven days can push settlement to 50-50 under the rulebook. The market page shows trading activity and an event window around the scheduled National Bank Open meeting, so any change in court allocation, withdrawal, or walkover announcement would matter more than generic pre-match commentary.[4][14][15] News and odds services have continued to list the tie-up as Mensik-favoured, which means the key watchpoint is not abstract form but whether the fixture proceeds cleanly and on schedule.[1][2][6]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews National Bank Open: Terence Atmane vs Jakub Mensik 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 Polymarket Alternative UK, 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.

UK Frequently Asked Questions

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 Polymarket Alternative UK. 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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.