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 |
|---|---|
| Cincinnati Open: Arthur Fery vs James Duckworth | 100% |
| Completed Match | 100% |
| Cincinnati Open: Arthur Fery vs James Duckworth Total Sets: O/U 2.5 | 100% |
| Cincinnati Open: Arthur Fery vs James Duckworth Set 1 Winner | 100% |
| Cincinnati Open: Arthur Fery vs James Duckworth Match O/U 21.5 | 100% |
| Cincinnati Open: Arthur Fery vs James Duckworth Set 1 O/U 8.5 | 100% |
| Cincinnati Open: Arthur Fery vs James Duckworth Set 1 O/U 9.5 | 100% |
| Cincinnati Open: Arthur Fery vs James Duckworth Match O/U 22.5 | 100% |
| Cincinnati Open: Arthur Fery vs James Duckworth Match O/U 23.5 | 100% |
| Cincinnati Open: Arthur Fery vs James Duckworth Set 2 Winner | 0% |
| Cincinnati Open: Arthur Fery vs James Duckworth Set 2 O/U 8.5 | 0% |
| Cincinnati Open: Arthur Fery vs James Duckworth Set Handicap +/-1.5 | 0% |
| Cincinnati Open: Arthur Fery vs James Duckworth Set 2 O/U 9.5 | 0% |
| Cincinnati Open: Arthur Fery vs James Duckworth Set 2 O/U 10.5 | 0% |
| Cincinnati Open: Arthur Fery vs James Duckworth Set 1 O/U 10.5 | 0% |
Market context
Arthur Fery and James Duckworth were due to meet in the Cincinnati Open second round on outdoor hard courts, with the match originally scheduled for 15 August and Duckworth already through from the first round after beating J.J. Wolf. The market’s 30% price on Fery sits below some pre-match models and listings that had him as a narrow favourite, but still reflects the uncertainty created by the timing, the hard-court setting and the players’ contrasting profiles. Fery has had a strong 2026 by result level, while Duckworth has arrived with far more mixed season form despite taking a win in Cincinnati. [1][3][6][8]
The key read-through is that this is not a pure ranking play, because both players have shown enough recent competitiveness to keep the result live, and Fery’s 2026 win rate is materially stronger than Duckworth’s broader season record. Comparable ATP Masters 1000 matches in the draw have also been sensitive to scheduling and late-order changes, especially when a player is coming off a first-round match and the other has had a bye. [3][6][8][9]
Traders should watch for final scheduling, any walkover or delay beyond the seven-day settlement window, and whether the match is actually completed rather than merely started. Duckworth’s advance against Wolf is the clearest recent form marker, while Fery’s draw position and Cincinnati court assignment remain the main dependencies; if the match is pushed back too far or cancelled, the market can still resolve 50-50 under the rules. [1][3][8][13]
Methodology
Sports-specific comparison page for Cincinnati Open: Arthur Fery vs James Duckworth. 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.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- 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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