National Bank Open: Alex Michelsen vs Francisco Cerundolo

Platform comparison

Market context

Polymarket prices the Michelsen–Cerundolo contract at **78% YES** today, with settlement running through the 7-day delay rule and paid out in **USDC on Polygon** via conditional tokens once the match outcome is fixed. In practical terms, the market is leaning strongly towards **Alex Michelsen advancing**, and the key question for traders is whether that price still leaves room for Cerundolo upside or simply reflects the current tournament setup.

That 78% sits above several outside indicators. Tennis Temple lists Cerundolo as the higher-ranked player, but Tennis.com’s pre-match projection had Michelsen at about **60%** to win, while BetUS priced Michelsen around **-180** and Cerundolo **+150**. Head-to-head is also neutral at **0-0**, so the contract is not being driven by any prior matchup edge. Recent comparable situations at the National Bank Open matter here: Michelsen has already beaten stronger opposition in this event, while Cerundolo’s 2025 run in Canada ended by retirement against Zverev, underlining how quickly Masters matches can turn on fitness and match state rather than ranking alone.[2][5][12][15][16]

For catalysts, traders should watch the official draw and live-score feeds, since the market resolves only when one player clearly advances or the contest falls into a cancellation/postponement bucket. The National Bank Open match page and live-scores section are the most direct operational references, and multiple listings place this fixture on **Court 9** on **5 August 2026**, so any schedule shift, late court change, or medical timeout that prevents completion could matter for settlement.[3][6][18] There is also a non-trivial payout-risk angle in best-of-three ATP Masters tennis: if the match starts but is not completed, the contract rules will determine whether it resolves on a winner or reverts to the tie-like outcome, so traders will be watching official confirmation rather than assuming pre-match pricing will carry straight through.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews National Bank Open: Alex Michelsen vs Francisco Cerundolo 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 Kalshi 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 Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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%.