National Bank Open: Mirra Andreeva vs Karolina Pliskova

Platform comparison

Market context

Mirra Andreeva is priced as the clear favourite in this National Bank Open second-round match, with Polymarket’s contract effectively trading as a near-certain **YES** on Andreeva advancing. That matters because the market resolves on the actual winner who progresses, not on set score, and the position sits in USDC on Polygon via conditional tokens, so settlement is tied to the official match outcome rather than sportsbook-style grading.

The current price is broadly consistent with external tennis markets, which also lean heavily towards Andreeva. Tennis.com listed Andreeva at about 73% projected winner probability, while other feeds showed moneyline pricing around -330 to -375 for Andreeva versus +275 to +330 for Karolina Pliskova, implying a sizeable gap in baseline strength[1][6][16]. That framing fits a familiar pattern in WTA events: a higher-ranked, younger player can trade close to certainty on paper even when an experienced opponent remains dangerous if the match becomes serve-dominated or stretched by tiebreaks[2][10].

For traders, the main catalysts are straightforward: confirmation that the match goes ahead on schedule, any court-order changes, and whether the contest is completed within the settlement window. The market documentation says a cancellation, tie, or delay beyond seven days from the scheduled date would settle 50-50, while a started-but-unfinished match would depend on who advances under the event’s official ruling. Live draw and schedule pages already list the fixture as an upcoming round-two match, so the key watchpoints are the tournament’s updated order of play and any late withdrawal news before first serve[1][4][13].

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

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 PolyGram. 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%.