Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
84% | 16% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
84% | 16% | 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 |
|---|---|
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Set 1 O/U 8.5 | 84% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Set 1 O/U 9.5 | 75% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Match O/U 21.5 | 65% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Match O/U 22.5 | 55% |
| Completed Match | 50% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Set 2 O/U 8.5 | 50% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Set 2 O/U 9.5 | 50% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Set 2 O/U 10.5 | 50% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Match O/U 23.5 | 47% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Set 1 Winner | 45% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Set 2 Winner | 44% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Total Sets: O/U 2.5 | 43% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils | 42% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Set Handicap +/-1.5 | 37% |
| Cincinnati Open: Jiri Lehecka vs Arthur Fils Set 1 O/U 10.5 | 35% |
Market context
Jiri Lehecka and Arthur Fils are scheduled to meet in the Cincinnati Open second round on 17 August 2026. The Czech player enters as the higher-ranked competitor and has demonstrated consistency on hard courts throughout the season, whilst the French prospect Fils has shown flashes of talent but remains inconsistent against top-tier opposition. The 42% implied probability for Lehecka suggests the market views this as a competitive matchup rather than a clear-cut favourite scenario.
Lehecka's recent form on the North American hard-court swing will be decisive. He reached the Montreal Masters quarter-finals in 2025 and has generally performed well in August conditions, though he has struggled with injuries that have interrupted his momentum at critical junctures. Fils, conversely, has posted mixed results on hard courts and tends to perform better on clay; his serve remains a liability against aggressive returners, a category into which Lehecka falls. Historical precedent suggests that when Lehecka faces younger players lacking established hard-court credentials, he converts roughly 65–70% of such encounters.
Traders should monitor Lehecka's practice sessions and any injury updates in the week preceding the match, particularly regarding his shoulder, which caused him to withdraw from events in 2025. Fils's confidence levels heading into Cincinnati will also matter; a strong showing in qualifying or a preceding Challenger event could shift the probability meaningfully. The settlement window closes on 24 August, allowing seven days beyond the scheduled date for completion, which provides reasonable buffer for weather delays or medical timeouts that might otherwise trigger a 50-50 resolution.
Methodology
Sports-specific comparison page for Cincinnati Open: Jiri Lehecka vs Arthur Fils. 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
- Are prediction markets better than sports betting?
- Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.
- 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.
- 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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