Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) 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 |
|---|---|
| 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 | 31% |
| 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 Belgian ranked considerably higher on the ATP ladder and carrying the weight of expectation in this encounter. The 28% implied probability for Geerts suggests the market views Poullain as a genuine threat despite the ranking disparity, reflecting either recent form shifts or specific surface considerations that favour the Frenchman's game.
Geerts has shown volatility across hard courts and grass in recent seasons, with performances at lower-tier events sometimes failing to reflect his seeding. Poullain, conversely, has demonstrated particular comfort on grass courts, where his serve-and-volley tendencies and movement patterns have yielded upsets against higher-ranked opponents in past seasons. Historical precedent at Roehampton favours players with strong grass-court records and aggressive net play, factors that could explain why the market has priced Geerts' win probability below what his ranking alone would suggest.
Traders should monitor both players' performances in the weeks preceding August 2026, particularly their results at warm-up events and any coaching adjustments announced beforehand. Injury reports carry weight here—Geerts has dealt with recurring fitness concerns that occasionally affect his consistency, whilst Poullain's physical durability on grass has proven reliable. The settlement window closes 27 August, allowing a seven-day grace period for rescheduling should weather or other disruptions occur, though Roehampton's scheduling typically accommodates matches without significant delays.
Methodology
Sports-specific comparison page for Roehampton: Michael Geerts vs Lucas Poullain. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
UK Frequently Asked Questions
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- 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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