Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
50% | 50% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
50% | 50% | 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 |
|---|---|
| Brownsburg: Gauthier Onclin vs Yi Zhou | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set 2 Winner | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Match O/U 21.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set 1 O/U 8.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set 1 Winner | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set 2 O/U 8.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set Handicap +/-1.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Total Sets: O/U 2.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Match O/U 22.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set 1 O/U 9.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set 2 O/U 9.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set Handicap +/-1.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Match O/U 23.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set 1 O/U 10.5 | 50% |
| Brownsburg: Gauthier Onclin vs Yi Zhou Set 2 O/U 10.5 | 50% |
| Completed Match | 0% |
Market context
Gauthier Onclin and Yi Zhou are scheduled to meet in Brownsburg on outdoor hard court, with the market hinging on whether Onclin advances or Zhou does. The current crowd-implied 50% price is consistent with a near coin-flip view rather than a strong edge either way, and the contract’s USDC cash settlement means the key issue is the official outcome, not in-play market noise.
Historical framing points to a modest ranking gap but not a decisive one: Onclin is listed around ATP 167 live, while Zhou is around ATP 244 live, which is enough to justify a small pre-match lean towards Onclin but still leaves plenty of upset risk in Challenger-level tennis.[2][8][12] Comparable pricing from sportsbooks also looks balanced rather than lopsided, with one market showing Onclin at 8/15 and Zhou at 5/4, implying only a slight favourite’s edge for Onclin.[14] In that context, 50% is broadly readable as an efficient midpoint unless fresh team or condition news shifts expectations.
The main catalysts are basic but important: whether the match starts on schedule, whether there is a postponement, and whether either player withdraws or retires, since those outcomes can flip the resolution path or leave the market at 50-50 if no winner is determined within the contract rules. Official listings currently show the match as upcoming at Brownsburg and scheduled for 10 August at 14:00, but there is already inconsistent timing across feeds, which is a reminder that late schedule changes are the main operational risk for settlement.[1][7][10][12] For crypto-linked traders, the practical angle is less about BTC or ETH beta here and more about execution: a 50% market can move quickly if the draw order, court assignment, or any pre-match withdrawal is confirmed.
Methodology
This page reads Brownsburg: Gauthier Onclin vs Yi Zhou 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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