Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) 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: Nikola Bartunkova vs Amanda Anisimova Set 1 Winner | 100% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Set 1 O/U 8.5 | 100% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Match O/U 22.5 | 96% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Match O/U 23.5 | 82% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Total Sets: O/U 2.5 | 73% |
| Completed Match | 50% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Match O/U 21.5 | 50% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova | 44% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Set Handicap +/-1.5 | 7% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Set 2 Winner | 0% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Set 2 O/U 8.5 | 0% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Set 1 O/U 9.5 | 0% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Set 2 O/U 9.5 | 0% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Set 1 O/U 10.5 | 0% |
| National Bank Open: Nikola Bartunkova vs Amanda Anisimova Set 2 O/U 10.5 | 0% |
Market context
The National Bank Open match between Nikola Bartunkova and Amanda Anisimova is live and the market has already moved to a slight Anisimova lean, with the crowd at 56% YES. Anisimova is the higher-ranked player at WTA 10 versus Bartunkova’s WTA 42, and the pre-match price data in market feeds had her as a clear favourite, which explains why the current probability sits above even money despite no prior head-to-head between them.[2][3][4][5]
For comparison, this is a useful spot to read through ranking and surface context rather than rivalry history, because these players have never met before and both are on the hard-court swing.[1][4][11] Season-level numbers show Anisimova with a modest edge in overall win rate and stronger serve-and-return indicators, while Bartunkova’s results are still competitive enough to keep this from being priced as a near-lock.[2][4] That combination is consistent with a market in the mid-50s: the favourite is clear, but not dominant, and first-set momentum can matter more than reputation in a fresh matchup.[6][13]
The main catalysts now are straightforward: whether the match continues on schedule, whether the live score flips momentum, and whether any retirement, suspension or weather-related delay pushes the contest into the market’s special settlement rules. Flashscore and Yahoo’s live feeds were still listing the match and updating it as active, so traders should watch for any official completion, abandonment or postponement notices from the event rather than relying only on pre-match listings.[3][7][12] If the match is not completed, the resolution depends on how far it gets and whether it is finished within the allowed window.
Methodology
We track National Bank Open: Nikola Bartunkova vs Amanda Anisimova 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
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
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.
- 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%.
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