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 |
|---|---|
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set 1 O/U 8.5 | 100% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set 1 O/U 9.5 | 100% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set 1 O/U 10.5 | 100% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set Handicap +/-1.5 | 72% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Match O/U 21.5 | 68% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Match O/U 22.5 | 63% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Match O/U 23.5 | 61% |
| Completed Match | 50% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set 2 O/U 8.5 | 50% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set 2 O/U 9.5 | 50% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set 2 O/U 10.5 | 50% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Total Sets: O/U 2.5 | 28% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set 2 Winner | 26% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur | 10% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set 1 Winner | 0% |
Market context
The Cincinnati Open men's draw will feature Arthur Fery against Alex de Minaur in the early rounds, with the match originally scheduled for 17 August 2026 at 10:00 AM ET. De Minaur, ranked consistently in the top 15, brings significantly more ATP ranking points and match experience at Masters 1000 events than Fery, whose career trajectory remains developmental. The 27% implied probability for Fery suggests the market is pricing a substantial underdog position, reflecting the gap in their respective tour records and surface performance data.
De Minaur's record at Cincinnati and comparable hard-court Masters events provides the baseline for assessing this matchup. Over the past three seasons, de Minaur has advanced past opening-round opponents at Cincinnati with regularity, though early-round upsets remain statistically plausible—particularly if Fery enters with recent momentum from qualifying rounds or lower-tier tour events. Historical Cincinnati draws show that unseeded players ranked outside the top 50 advance roughly 20–25% of the time against top-20 opponents, which aligns closely with current market pricing.
Traders should monitor ATP injury reports and practice-court activity in the week preceding 17 August, as de Minaur's durability record and any late fitness concerns would shift the probability meaningfully. Tournament draws confirmed by the ATP typically release 48 hours before play begins; confirmation of this specific matchup and court assignment will serve as a final catalyst. Settlement occurs at 14:00 UTC on 24 August, allowing a seven-day window for completion or tie-resolution mechanics to activate.
Methodology
This page reads Cincinnati Open: Arthur Fery vs Alex de Minaur 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
- 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.
- What does a transaction cost on Polygon?
- Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.
- 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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