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 |
|---|---|
| Completed Match | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set 2 Winner | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Total Sets: O/U 2.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set 1 O/U 8.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set 2 O/U 8.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Match O/U 21.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set 1 O/U 9.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set 2 O/U 9.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Match O/U 22.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set 1 O/U 10.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set 2 O/U 10.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Match O/U 23.5 | 100% |
| National Bank Open: Maya Joint vs Liudmila Samsonova | 0% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set 1 Winner | 0% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set Handicap +/-1.5 | 0% |
| National Bank Open: Maya Joint vs Liudmila Samsonova Set Handicap +/-1.5 | 0% |
Market context
Maya Joint and Liudmila Samsonova are still on the board for a third-round match in Toronto, but the market’s **0% YES** price shows traders are not assigning any meaningful chance to a straightforward Joint advance at the moment. The most recent betting reads leave Samsonova as a clear favourite, with offshore and sportsbook snapshots putting her around the mid-60s to low-70s in win probability, while Joint is priced in the low-30s or below.[2][11][13]
That lines up with the main historical frame: Samsonova already leads the head-to-head 1-0, and that previous win came at Wimbledon last year.[1][16] She also arrives with the stronger tour profile in the available data, including a higher ranking and a recent straight-sets win over Barbora Krejcikova, which is why the market is treating her as the more likely winner on outdoor hard courts.[1][3][7]
For traders, the key catalysts are still whether the match starts as scheduled and whether Toronto’s draw timing holds. The official tournament listing and match pages show the fixture on 7 August at Grandstand, and any late change to order of play, withdrawal, or weather-related delay would matter because the market resolves to 50-50 if the match is not played, tied, or pushed beyond the seven-day settlement window.[5][9] If play begins, in-match momentum is the main dependency: a completed finish matters more than pre-match pricing, because an unfinished match can still resolve on advancement if one player is awarded the win.[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 Prediction Today, which mirrors the Polymarket order book directly.
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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