Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
88% | 12% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
88% | 12% | 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: Alex Michelsen vs Francisco Cerundolo Set 1 Winner | 88% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo | 75% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Set 2 Winner | 57% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Match O/U 21.5 | 54% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Set Handicap +/-1.5 | 52% |
| Completed Match | 50% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Set 2 O/U 8.5 | 50% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Set 1 O/U 8.5 | 50% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Set 2 O/U 9.5 | 50% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Set 1 O/U 9.5 | 50% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Set 2 O/U 10.5 | 50% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Set 1 O/U 10.5 | 50% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Match O/U 22.5 | 47% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Match O/U 23.5 | 45% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Total Sets: O/U 2.5 | 41% |
| National Bank Open: Alex Michelsen vs Francisco Cerundolo Set Handicap +/-1.5 | 9% |
Market context
Alex Michelsen is set to meet Francisco Cerúndolo in the National Bank Open’s second round, a hard-court match listed for Court 9 on 5 August. Tournament listings currently show the contest as upcoming, while several sportsbook and tennis data pages are pricing Michelsen as a slight favourite, with implied win chances around 60/40 rather than a clear mismatch.[1][4][7][8]
The current 59% crowd-implied probability sits close to those market reads and is consistent with a live ATP Masters 1000 context where small edges can flip quickly on surface and recent form. Michelsen has already shown he can beat higher-seeded opposition at this event, while Cerúndolo comes in with a stronger ranking but a profile that is less naturally tied to hard courts than clay, which is usually why this pairing attracts a modest rather than dominant price.[3][11][13] In prediction-market terms, that means the USDC-settled contract is mostly a read on which player actually advances, with the 50-50 fallback only relevant if the match is abandoned, never starts, or slips beyond the seven-day window.
The main catalysts are straightforward: official order-of-play updates, any change in court assignment or start time, and late injury or withdrawal news. The tournament site still had no live match in progress at the time of checking, which leaves the market exposed to routine ATP scheduling risk rather than a structural dispute over the outcome.[14][1] For crypto-linked traders, broader BTC and ETH volatility matters only indirectly here, through USDC liquidity and risk appetite rather than the tennis logic itself.
Methodology
This page reads National Bank Open: Alex Michelsen vs Francisco Cerundolo 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.
- Why USDC and not ETH or USDT?
- USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.
- 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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