Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Prediction Today) 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 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 | 73% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Match O/U 21.5 | 67% |
| 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 Set 2 Winner | 26% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Total Sets: O/U 2.5 | 26% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur | 10% |
| Cincinnati Open: Arthur Fery vs Alex de Minaur Set 1 Winner | 0% |
Market context
Arthur Fery faces Alex de Minaur in the Cincinnati Open second round on 17 August 2026. The 35% probability assigned to Fery reflects a significant underdog position against de Minaur, who enters as the clear favourite. No material changes to either player's status have emerged in the past 48 hours; the odds appear stable relative to their seeding differential and recent form trajectories heading into the hard-court Masters 1000 event.
De Minaur's ranking advantage and proven Cincinnati pedigree form the baseline for current pricing. The Australian has consistently performed at this venue and typically advances from early rounds, whilst Fery—a lower-ranked challenger—would need to execute a near-flawless performance to upset. Historical patterns at Cincinnati show that seeded players in de Minaur's position convert roughly 75–80% of such matchups, which aligns reasonably with the 65% implied probability against Fery.
Traders should monitor the official draw confirmation and any late withdrawal announcements through the ATP's Cincinnati Open channels. Weather disruptions are a secondary consideration; August conditions in Cincinnati rarely force multi-day delays. Injury reports on either player in the 72 hours before the match remain the primary catalyst that could shift pricing materially. De Minaur's recent injury history warrants particular attention, as any physical concern could narrow Fery's odds substantially. The settlement window closes at 14:00 ET on 24 August, allowing a full week for the match to complete without triggering the 50-50 tie resolution clause.
Methodology
This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Prediction Today, which mirrors the Polymarket order book directly.
Resolution & payout
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- What's the difference between YES and NO shares?
- A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- 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%.
Trade Cincinnati Open: Arthur Fery vs Alex de Minaur on Prediction Today
Live order book, 0% fees, USDC settlement in seconds.
Open live market →