National Bank Open: Jacob Fearnley vs Jakub Mensik

Platform comparison

Market context

Polymarket is pricing Jacob Fearnley at **39%** on the USDC market for this National Bank Open match, with the contract settled through Polygon conditional tokens rather than a simple moneyline. In practical terms, the market is saying Fearnley is the underdog against Jakub Mensik, but not by a huge margin, so any late change to the draw, court order, or completion status could matter as much as the on-court edge.

The match-up has no head-to-head history, so traders are leaning on profile data rather than direct evidence. Mensik carries the stronger season and hard-court numbers: one source has him at 34-20 over the last 52 weeks and 16-7 on hard this season, while Fearnley is around 29-29 over the same period and 10-9 on hard in 2026.[2][4][16] Ranking also points the same way, with Mensik listed near ATP No. 17 and Fearnley around No. 110 in one current data feed.[3] That combination explains why the market sits below parity, though Fearnley’s recent run of wins keeps him live enough for a near 40% read.[2][4]

What matters for the ticket is whether the scheduled start holds and whether the match is completed within the settlement rules. The contract resolves to **50-50** if the match is not played, ends level, or is delayed beyond seven days without a winner, so traders are watching tournament scheduling updates, rain disruption, and any ATP order-of-play changes that could push the fixture outside the window. If play starts but does not finish, advancement rules still decide the outcome, which means retirement or walkover mechanics can swing the market even without a completed scoreline.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Jacob Fearnley vs Jakub Mensik across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

UK Frequently Asked Questions

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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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%.