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 |
|---|---|
| Completed Match | 100% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Set 2 O/U 8.5 | 100% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Set Handicap +/-1.5 | 100% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Set 2 Winner | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Match O/U 21.5 | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Set 1 O/U 8.5 | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Set 1 Winner | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Total Sets: O/U 2.5 | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Match O/U 22.5 | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Set 2 O/U 9.5 | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Set 1 O/U 9.5 | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Match O/U 23.5 | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Set 2 O/U 10.5 | 0% |
| Cincinnati Open: Zeynep Sonmez vs Amanda Anisimova Set 1 O/U 10.5 | 0% |
Market context
The Cincinnati Open will feature a first-round encounter between Turkish qualifier Zeynep Sonmez and American former top-20 player Amanda Anisimova on 15 August 2026. The crowd-implied probability of 8% for Sonmez reflects substantial confidence in Anisimova's superiority, positioning the Turkish player as a heavy underdog in this hard-court matchup.
Anisimova's career trajectory provides the primary lens for interpreting the current odds. The American reached a Grand Slam semi-final at the 2019 US Open aged 17 and has maintained a top-50 ranking through her twenties, though injuries and inconsistency have prevented her from sustaining a top-20 presence. Sonmez, by contrast, operates primarily on the ITF circuit and lower-tier WTA events; her qualification for Cincinnati represents a significant achievement but offers limited precedent for defeating an opponent of Anisimova's pedigree. Historical patterns suggest that when established WTA players face qualifiers from outside the top 100, the favourite wins approximately 85–90% of the time, which aligns closely with the current 92% implied probability for Anisimova.
Traders should monitor Anisimova's recent form entering Cincinnati, particularly her results in the weeks preceding the tournament and any injury reports. Sonmez's draw luck—having qualified rather than received a direct entry—suggests she may carry momentum, though this rarely translates against significantly higher-ranked opposition. The settlement window extends to 22 August, providing a seven-day buffer beyond the scheduled date, which reduces the risk of ambiguous resolution through delays.
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
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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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