Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Open live market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Open live market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Open live market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Open live market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| National Bank Open: Cameron Norrie vs Alex de Minaur | 100% |
| Completed Match | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Set 2 O/U 8.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Set 2 Winner | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Set 1 O/U 8.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Match O/U 21.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Total Sets: O/U 2.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Set 2 O/U 9.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Set 1 O/U 9.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Match O/U 22.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Set 2 O/U 10.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Set 1 O/U 10.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Match O/U 23.5 | 100% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Set 1 Winner | 0% |
| National Bank Open: Cameron Norrie vs Alex de Minaur Set Handicap +/-1.5 | 0% |
Market context
Cameron Norrie and Alex de Minaur meet at the National Bank Open on hard court, with the market priced at just **8% YES** on Norrie advancing. That is well below the shape of the recent head-to-head: de Minaur leads the overall series **3-1** in one set of records, but Norrie has taken the most recent hard-court meeting, beating de Minaur **6-4, 6-4** at Indian Wells in March 2026. Another head-to-head source also shows de Minaur stronger over the last 52 weeks, with a **67.1%** win rate versus **58.8%** for Norrie, which helps explain why the crowd is leaning heavily towards the Australian here.[2][6]
For traders, the key read-through is that this contract settles on who advances, not on the scoreline, so the practical risk is any late withdrawal, walkover, or weather-related disruption around the scheduled start. If the match is not played, ends without a winner, or is delayed beyond seven days from the scheduled date, the market resolves to **50-50** under the contract rules. If it begins and one player is awarded the win through retirement or completion, that still resolves to the advancing player, so any official tournament update matters more than in-match momentum. Because settlement is in **USDC**, the event-specific driver sits alongside wider crypto conditions: if BTC and ETH volatility lifts funding or spot flows during the window, that can affect how tightly the market tracks the underlying tennis probability, even though the contract itself is determined only by the ATP result.
Methodology
This page reads National Bank Open: Cameron Norrie vs Alex de Minaur on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
Resolution & payout
Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.
Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.
UK Frequently Asked Questions
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- 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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