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 |
|---|---|
| Completed Match | 100% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Set 1 O/U 8.5 | 100% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Total Sets: O/U 2.5 | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Set 2 Winner | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Set 2 O/U 8.5 | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Set 1 Winner | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Match O/U 21.5 | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Set Handicap +/-1.5 | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Set 1 O/U 9.5 | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Set 2 O/U 9.5 | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Match O/U 22.5 | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Set 1 O/U 10.5 | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Set 2 O/U 10.5 | 0% |
| Cincinnati Open: Ashlyn Krueger vs Lois Boisson Match O/U 23.5 | 0% |
Market context
The Cincinnati Open, held annually as part of the ATP and WTA tour calendar, will feature a first-round matchup between American qualifier Ashlyn Krueger and French player Lois Boisson on 13 August 2026. Krueger, ranked outside the top 200, competes primarily on the ITF circuit and has limited WTA main-draw experience. Boisson, similarly ranked in the 150–200 range, has competed sporadically on the WTA tour with modest results. The 3% implied probability for Krueger reflects her status as the underdog in a matchup between two players with comparable tour profiles, though the extreme skew suggests market participants have assigned material weight to Boisson's recent form or head-to-head record.
Historical precedent for matches between players at this ranking tier shows high volatility in outcomes. Qualifiers and lower-ranked players often produce upsets in early rounds of major tournaments, particularly when seeding advantages are absent. The Cincinnati Open's hard court surface favours aggressive baseline play, a variable that can shift matchup dynamics unpredictably. Without published recent head-to-head records or significant injury reports as of late July 2026, traders should monitor WTA rankings updates and any late withdrawals from the draw, which would trigger the 50-50 resolution clause if the match is not played within seven days of the scheduled date.
Settlement in USDC against the 20 August deadline allows for rapid position closure post-match. Traders should track Cincinnati Open draw confirmations and any schedule adjustments announced by the WTA, as weather delays or court availability could push the match beyond the seven-day window and force 50-50 resolution regardless of on-court outcome.
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.
- 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.
- 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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