Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Kalshi UK) 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: Diane Parry vs Caroline Dolehide | 100% |
| Completed Match | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Set 1 Winner | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Match O/U 21.5 | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Set 2 O/U 8.5 | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Set 1 O/U 8.5 | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Set 2 Winner | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Set 2 O/U 9.5 | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Match O/U 22.5 | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Set 1 O/U 9.5 | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Set 2 O/U 10.5 | 100% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Total Sets: O/U 2.5 | 0% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Set Handicap +/-1.5 | 0% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Match O/U 23.5 | 0% |
| Cincinnati Open: Diane Parry vs Caroline Dolehide Set 1 O/U 10.5 | 0% |
Market context
Polymarket currently prices Parry's advancement at 69 cents on the dollar, implying roughly a two-to-one edge over Dolehide in this first-round Cincinnati Open matchup scheduled for 13 August 2026. The conditional token structure on Polygon means traders holding YES positions gain exposure to Parry's progression through USDC settlement, with the market closing seven days post-scheduled start or upon match completion, whichever comes first.
Parry holds a 3–1 head-to-head record against Dolehide across their career meetings, with their most recent encounter at a WTA 500 event in 2024 favouring the French player in straight sets. Dolehide, however, has shown improved form on hard courts in North American summer tournaments, reaching quarterfinals at comparable events. The 69% probability reflects Parry's seeding advantage and recent ranking trajectory rather than a dominant historical pattern—Dolehide has taken sets off higher-ranked opponents at Cincinnati in prior years, suggesting the current odds leave room for upset scenarios.
Traders should monitor draw announcements and any late withdrawals from the tournament draw, as scheduling changes could affect match timing or opponent strength. Surface conditions at the Lindner Family Tennis Center favour baseline players with consistent groundstrokes, a category where Parry typically outperforms. Injury reports in the week preceding 13 August will be critical; either player's physical status could shift the conditional token pricing materially before the settlement window closes on 20 August.
Methodology
We track Cincinnati Open: Diane Parry vs Caroline Dolehide across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.
Resolution & payout
Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.
Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.
UK Frequently Asked Questions
- Where can I trade this market with the lowest fees?
- Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- 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.
- 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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