National Bank Open: Mirra Andreeva vs Karolina Pliskova

Platform comparison

Market context

Mirra Andreeva and Karolina Pliskova are due to meet in the National Bank Open second round on hard court, with the market currently pricing an Andreeva advance as near-certain. The live market is already effectively at **100% YES**, so in tooling terms this is the sort of event where a programmatic workflow would usually treat the position as a binary confirmation task rather than a pricing exercise, because the settlement text only flips to 50-50 if the match is not completed on time or is abandoned altogether.[1][2][3]

The historical read still points strongly towards Andreeva. She leads the head-to-head 1-0, with the previous meeting won in straight sets at Cincinnati in 2024, and she is the higher-ranked player by a wide margin at WTA No. 5 versus Pliskova at No. 63.[13][1] Independent previews also frame Andreeva as the clear favourite, although several note that Pliskova’s serve and experience can make the match more competitive than the ranking gap implies.[4][7][10][17]

For a trader watching this programmatically, the main catalysts are operational rather than thematic: official match status, court assignment, start-time changes, and any injury or withdrawal notices. The match is listed as an upcoming round-two meeting in Toronto, with some live-score feeds already showing scheduled times on 5 August 2026, so any slip in the draw order or a weather delay could matter if the start is pushed back materially.[3][5][11] That matters because the market resolves to 50-50 only if the match is not played, ends level, or is delayed more than seven days beyond the scheduled date without a winner.[Market description]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track National Bank Open: Mirra Andreeva vs Karolina Pliskova 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

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%.