Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| National Bank Open: Mirra Andreeva vs Karolina Pliskova | 100% |
| Completed Match | 100% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Set 1 Winner | 100% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Set 2 Winner | 100% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Set Handicap +/-1.5 | 100% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Total Sets: O/U 2.5 | 0% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Match O/U 21.5 | 0% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Set 1 O/U 8.5 | 0% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Set 2 O/U 8.5 | 0% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Match O/U 22.5 | 0% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Set 1 O/U 9.5 | 0% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Set 2 O/U 9.5 | 0% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Match O/U 23.5 | 0% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Set 1 O/U 10.5 | 0% |
| National Bank Open: Mirra Andreeva vs Karolina Pliskova Set 2 O/U 10.5 | 0% |
Market context
Mirra Andreeva and Karolina Pliskova are set for a National Bank Open second-round meeting in Toronto, with the market already priced as a near-certainty for Andreeva. Tennis.com lists Andreeva as the projected winner at 73%, while several books also show her as a clear favourite, with moneyline pricing around -330 to -375 against Pliskova’s plus-money return.[1][7][12]
The historical read on this probability is straightforward: the matchup has no established head-to-head edge from recent seasons, but the wider form gap is large enough to explain the market. Andreeva is ranked fifth and has been treated as the stronger hard-court player, while Pliskova sits outside the top 60 and is being priced as the underdog across previews and odds feeds.[5][9][16] Comparable market cases at this level usually only move away from an overwhelming favourite if there is an injury report, a retirement risk, or a major scheduling disruption.
The main catalysts traders should watch are official status updates, start-time changes, and any late withdrawal news from either camp. Match listings currently show the contest scheduled for 6 August, and live odds feeds are active, which implies the event is being treated as on track to be played.[2][4] If the draw or local schedule shifts, or if either player is reported unfit before first serve, that would matter more than minor line movement because this market resolves to 50-50 only if the match is not completed under the stated rules.[1][2]
Methodology
Sports-specific comparison page for National Bank Open: Mirra Andreeva vs Karolina Pliskova. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- 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%.
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