National Bank Open: Caty McNally vs Alexandra Eala

Platform comparison

Market context

Polymarket has this contract at **19% YES** on USDC collateral via Polygon, so the market is pricing Caty McNally as a clear underdog versus Alexandra Eala. For users, the key point is that settlement follows the on-chain event outcome: if McNally advances, the contract resolves to her; if Eala advances, it resolves to Eala; and a cancellation, no-result, or delay beyond seven days from the scheduled date would push it to 50-50.

The comparison data fit that pricing. Eala has been the steadier hard-court performer in recent sample sets, with a stronger 52-week record and a much better WTA hard-court career mark than McNally, while the available match preview also lists Eala as the projected winner. McNally’s recent season form is not weak, but her hard-court profile remains the more modest of the two, which helps explain why the market is not giving her a higher single-digit price despite the possibility of an upset.[1][3][4]

The live catalysts are straightforward: confirm the match is actually started, because an in-play retirement or walkover can still matter for settlement under the market rules, and watch the official National Bank Open scoreboard for status changes, order-of-play revisions, or postponements.[10] The main dependency is the tournament schedule itself; if Toronto weather, court congestion, or draw reshuffling pushes this beyond the seven-day window without a winner, traders should expect the fallback 50-50 outcome rather than a standard player-vs-player resolution.[10]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

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

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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%.