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, Qualification: Carol Young Suh Lee vs Polina Kudermetova Set 2 O/U 8.5 | 100% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Set 2 Winner | 100% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Set 1 O/U 8.5 | 100% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Set 2 O/U 9.5 | 100% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Set 1 O/U 9.5 | 100% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Set 2 O/U 10.5 | 100% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Match O/U 22.5 | 78% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Total Sets: O/U 2.5 | 73% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova | 51% |
| Completed Match | 50% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Match O/U 21.5 | 50% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Match O/U 23.5 | 50% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Set Handicap +/-1.5 | 49% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Set 1 Winner | 0% |
| Cincinnati Open, Qualification: Carol Young Suh Lee vs Polina Kudermetova Set 1 O/U 10.5 | 0% |
Market context
The Cincinnati Open qualifying round will feature American Carol Young Suh Lee against Russian Polina Kudermetova on 11 August 2026. Both players compete primarily on the ITF and lower-tier WTA circuits, making this a relatively even matchup in terms of ranking proximity and recent form. The market currently prices Lee's advancement at 51%, reflecting near-parity assessment from traders.
Kudermetova holds a modest edge in career ITF titles and has shown consistency in qualifying draws across mid-tier tournaments, whilst Lee has demonstrated improvement in 2026 but remains less established at this level. Historical qualifying matches between similarly ranked players typically resolve within the 45–55 probability band when head-to-head records are sparse or balanced. The settlement window extends to 18 August, allowing a seven-day buffer beyond the scheduled date; this cushion is material given occasional weather delays at Cincinnati in August, though the 2026 forecast shows typical summer conditions for the region.
Traders should monitor official Cincinnati Open draw confirmations and any late withdrawals from either player in the days preceding the match. Recent ITF circuit results and court-surface preference data—Lee's performance on hard courts versus Kudermetova's consistency across surfaces—will inform position adjustments closer to play. No significant injury reports or sponsorship changes have affected either player's availability as of early August 2026. The match outcome carries no direct macro implications for BTC or ETH funding rates, making this a pure tennis-fundamentals trade.
Methodology
Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.
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
- What are crypto prediction markets?
- Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.
- 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%.
Trade Cincinnati Open, Qualification: Carol Young Suh Lee … on BTC Prediction
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