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: Ann Li vs Kayla Cross | 100% |
| Completed Match | 100% |
| National Bank Open: Ann Li vs Kayla Cross Set 1 Winner | 100% |
| National Bank Open: Ann Li vs Kayla Cross Set 1 O/U 8.5 | 100% |
| National Bank Open: Ann Li vs Kayla Cross Set 2 O/U 8.5 | 100% |
| National Bank Open: Ann Li vs Kayla Cross Set 2 Winner | 100% |
| National Bank Open: Ann Li vs Kayla Cross Match O/U 21.5 | 100% |
| National Bank Open: Ann Li vs Kayla Cross Set Handicap +/-1.5 | 100% |
| National Bank Open: Ann Li vs Kayla Cross Set 1 O/U 9.5 | 100% |
| National Bank Open: Ann Li vs Kayla Cross Set 1 O/U 10.5 | 100% |
| National Bank Open: Ann Li vs Kayla Cross Total Sets: O/U 2.5 | 0% |
| National Bank Open: Ann Li vs Kayla Cross Set 2 O/U 9.5 | 0% |
| National Bank Open: Ann Li vs Kayla Cross Match O/U 22.5 | 0% |
| National Bank Open: Ann Li vs Kayla Cross Set 2 O/U 10.5 | 0% |
| National Bank Open: Ann Li vs Kayla Cross Match O/U 23.5 | 0% |
Market context
Kayla Cross’s upset of Katie Boulter in the opening round has changed the immediate shape of this match, because it confirms the Canadian wildcard is already carrying momentum into a second-round meeting with Ann Li. That has not moved the market away from Li as the clear favourite, but it does explain why the crowd view is not treating this as a routine name-versus-wildcard assignment; Li is still ranked around No. 31, while Cross is outside the top 170 and has just taken her first WTA 1000 main-draw win.[3][9]
The broader frame still favours Li on resume and ranking, and this is the pair’s first career meeting.[1][4] Li has considerably more experience in WTA 1000-level draws, while Cross is still at the early stage of her tour-level record, which is why most pre-match pricing has settled firmly on Li despite Cross’s home support in Toronto.[3][12] In comparable terms, markets like this usually stay one-sided unless the underdog has a recent high-profile win or the favourite arrives with obvious fitness doubts; here, only the former is present.[9][12]
For traders, the main catalysts are the official order of play, any revised start time, and whether the match is pushed back by weather or scheduling delays in Toronto.[6][10][14] The event is outdoors at Sobeys Stadium, so rain interruptions or court backlog are the main practical risks to timing rather than a change in competitive context.[6][14] If the match starts, the key live variable is whether Cross can reproduce the serving level and pressure resistance she showed against Boulter; if not, Li’s higher ranking and deeper tour experience should continue to anchor the market.[3][9]
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
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%.
Trade National Bank Open: Ann Li vs Kayla Cross on Prediction Today
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