Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Who Will Win) 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: Coco Gauff vs Marie Bouzkova | 100% |
| Completed Match | 100% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Set 1 Winner | 100% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Set 1 O/U 8.5 | 100% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Set 2 Winner | 100% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Set Handicap +/-1.5 | 100% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Total Sets: O/U 2.5 | 0% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Match O/U 21.5 | 0% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Set 2 O/U 8.5 | 0% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Match O/U 22.5 | 0% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Set 1 O/U 9.5 | 0% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Set 2 O/U 9.5 | 0% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Set 1 O/U 10.5 | 0% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Match O/U 23.5 | 0% |
| Cincinnati Open: Coco Gauff vs Marie Bouzkova Set 2 O/U 10.5 | 0% |
Market context
Coco Gauff’s Cincinnati Open meeting with Marie Bouzkova is priced at a 100% implied chance of a Gauff advance, so the market is treating this as a near-lock rather than a true two-way contest. That consensus fits the basic seeding and form picture: Gauff is the No. 4 seed and world No. 4, while Bouzkova is the No. 22 seed and world No. 27/28, and the pre-match model and bookmaker-style estimates in circulation have also leaned strongly towards Gauff, around the mid-70s to high-70s in win probability.
The historical frame is less one-sided than the current price. Bouzkova leads the head-to-head 2-1, including a hard-court win by retirement in Cincinnati in 2022, so there is at least a usable contrarian angle if the market is over-anchoring on ranking gap alone. Gauff has also shown vulnerability in this event, notably a second-round battle with Ann Li in which she was extended in a tiebreak, while Bouzkova has already banked a tight straight-sets win over Iva Jovic to reach the last 16.
The main catalysts are simple: whether the match is played on schedule, and whether either player is forced into a late change by rain, court movement, or the broader Cincinnati draw. The WTA tournament runs through 23 August, and multiple live schedules placed this match for 19 August on a show court, so any delay beyond the seven-day settlement window would matter directly for market resolution. In handicap terms, the consensus sits firmly with Gauff; value, if any, sits in a Bouzkova upset or in any match interruption risk that could shift the market away from a clean advance.
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 Who Will Win, which mirrors the Polymarket order book directly.
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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
- Is this market available outside the US?
- Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
- 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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