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 |
|---|---|
| Roehampton: Michael Geerts vs Lucas Poullain Set 1 Winner | 100% |
| Roehampton: Michael Geerts vs Lucas Poullain Set 1 O/U 8.5 | 100% |
| Roehampton: Michael Geerts vs Lucas Poullain Set 2 O/U 8.5 | 100% |
| Roehampton: Michael Geerts vs Lucas Poullain Set 1 O/U 9.5 | 100% |
| Roehampton: Michael Geerts vs Lucas Poullain Set 1 O/U 10.5 | 100% |
| Roehampton: Michael Geerts vs Lucas Poullain Total Sets: O/U 2.5 | 75% |
| Roehampton: Michael Geerts vs Lucas Poullain Match O/U 21.5 | 75% |
| Roehampton: Michael Geerts vs Lucas Poullain Match O/U 22.5 | 75% |
| Roehampton: Michael Geerts vs Lucas Poullain Match O/U 23.5 | 75% |
| Completed Match | 50% |
| Roehampton: Michael Geerts vs Lucas Poullain | 27% |
| Roehampton: Michael Geerts vs Lucas Poullain Set Handicap +/-1.5 | 25% |
| Roehampton: Michael Geerts vs Lucas Poullain Set Handicap +/-1.5 | 25% |
| Roehampton: Michael Geerts vs Lucas Poullain Set 2 Winner | 0% |
| Roehampton: Michael Geerts vs Lucas Poullain Set 2 O/U 9.5 | 0% |
| Roehampton: Michael Geerts vs Lucas Poullain Set 2 O/U 10.5 | 0% |
Market context
Michael Geerts and Lucas Poullain are scheduled to meet at Roehampton in August 2026, with the match originally set for 20 August at 6:00 AM ET. The current crowd-implied probability of 27% for Geerts suggests moderate confidence in Poullain's chances, though both players remain relatively obscure at the professional level. Roehampton typically hosts qualifying rounds and lower-tier ATP events, meaning this encounter likely involves players ranked outside the top 100 or competing in satellite tournaments. The settlement window extends to 27 August, allowing a seven-day buffer for rescheduling before the market resolves to 50-50 in the event of cancellation or delay.
Historical precedent for matches between lower-ranked players shows that crowd probabilities often reflect limited public information and sparse head-to-head records. When comparable players meet at minor venues, the implied odds frequently shift sharply once recent form data or injury updates surface. Geerts' 27% backing suggests traders view Poullain as the favoured player, though this could reflect recent ranking movements, surface preference, or recent tournament results rather than fundamental skill gaps.
Traders should monitor ATP tour announcements and Roehampton's official schedule for any fixture changes or withdrawals in the fortnight before 20 August. Recent injury reports or late-stage ranking adjustments could trigger probability shifts. On-chain USDC settlement mechanics mean positions remain liquid throughout the window; significant whale flows into either side could signal private information about player fitness or tournament logistics. Surface conditions at Roehampton and any weather forecasts closer to the date will also influence late-stage trading activity.
Methodology
This page reads Roehampton: Michael Geerts vs Lucas Poullain 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%.
Trade Roehampton: Michael Geerts vs Lucas Poullain on BTC Prediction
Live order book, 0% fees, USDC settlement in seconds.
Open live market →