Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Tax UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
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
The Cincinnati Open, held annually at the Western & Southern Open in Mason, Ohio, draws elite tennis players competing for ranking points and prize money in the lead-up to the US Open. Arthur Fery, an Austrian player ranked outside the top 100, faces Australian veteran James Duckworth, who has maintained a presence in ATP competition despite recurring injuries. The match was originally scheduled for 15 August 2026 at 14:00 ET, with settlement occurring by 22 August 2026 at 18:00 UTC. The 100% implied probability suggests market participants expect the match to proceed as scheduled and reach a conclusive outcome.
Historical precedent in ATP tour markets shows that first-round matches at Masters 1000 events rarely cancel outright; withdrawal rates typically fall below 3% once draws are published. However, injury retirements during play—particularly for players with documented fitness concerns—occur in roughly 2–4% of matches involving players outside the top 50. Duckworth's history of shoulder and knee issues warrants monitoring, as does Fery's recent match volume and tournament preparation. The settlement clause triggering a 50-50 resolution if the match extends beyond seven days without completion or if either player retires mid-match creates a secondary risk vector distinct from a simple win-loss outcome.
Traders should track official ATP communications regarding draw confirmations, typically released 48 hours before tournament play begins. Weather delays at Cincinnati are uncommon in mid-August but possible; the venue's outdoor hard courts remain playable in most conditions. Recent tournament schedules and player injury bulletins from the ATP website and official Cincinnati Open announcements will clarify whether either competitor faces last-minute withdrawal or scheduling conflicts. Court assignments and match order adjustments, announced day-of, may shift timing but rarely prevent matches from occurring entirely.
Methodology
This overview of Cincinnati Open: Arthur Fery vs James Duckworth reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.
Resolution & payout
On Polymarket, resolution runs on-chain via UMA Optimistic Oracle. USDC payout is instant and automatic, with no KYC. Tax treatment depends on your jurisdiction — in the US, gains are usually ordinary income; in the UK, often capital gains. Consult a tax professional for your situation.
UK Frequently Asked Questions
- Is Polymarket legal in my country?
- Polymarket is geo-blocked in the US/UK/EU. Actual usage via the Polymarket interface is not possible there. The legal status itself varies — many countries treat prediction markets as a gray area. Polymarket Tax UK has a different geo footprint.
- Is Polymarket regulated by the UKGC?
- No. Polymarket is not licensed by the UK Gambling Commission (UKGC). It is a decentralised prediction market operated under US regulation. UK traders can use it but do not benefit from UKGC dispute resolution or player protection requirements.
- What are the HMRC tax rules on Polymarket profits for UK traders?
- Polymarket profits are treated as cryptocurrency disposal events by HMRC. Each USDC settlement is a taxable event subject to Capital Gains Tax (CGT). For 2026/27, the CGT rate is 18% (basic rate) or 24% (higher rate). The annual CGT exemption is £3,000. Report via HMRC Self Assessment if your total crypto gains exceed £3,000 or proceeds exceed £50,000.
- Does Polymarket KYC apply to UK users?
- Yes. Polymarket requires KYC (Know Your Customer) verification for all users, including UK residents. You must provide a government-issued photo ID and a selfie. The process typically takes 5–10 minutes via their ID verification provider.
- What is the legal difference between Polymarket and Betfair Exchange for UK traders?
- Betfair Exchange is UKGC-licensed, meaning UK consumer protections apply and winnings are typically tax-free. Polymarket is not UKGC-licensed — it operates under decentralised blockchain rules. Profits from Polymarket are subject to HMRC CGT as crypto disposals. Choose based on your regulatory preference and tax situation.
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