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: Oleksandra Oliynykova vs Mirra Andreeva Set Handicap +/-1.5 | 100% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Set 1 O/U 8.5 | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Total Sets: O/U 2.5 | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Set 1 Winner | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Set 2 O/U 8.5 | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Match O/U 21.5 | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Set 2 Winner | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Set 1 O/U 9.5 | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Set 2 O/U 9.5 | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Match O/U 22.5 | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Set 1 O/U 10.5 | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Set 2 O/U 10.5 | 0% |
| Cincinnati Open: Oleksandra Oliynykova vs Mirra Andreeva Match O/U 23.5 | 0% |
Market context
The Cincinnati Open will feature a meeting between Oleksandra Oliynykova and Mirra Andreeva in August 2026, with the market currently pricing Oliynykova at zero implied probability. This pricing reflects either extreme confidence in Andreeva or a severe absence of trading activity on the pairing. Andreeva, born in 2007, has emerged as one of the WTA's most promising young talents, reaching a career-high ranking in the top 50 and competing regularly in premier events. Oliynykova, a Ukrainian player competing on the professional circuit, faces a significant experience and ranking differential against her younger opponent. The 0% reading suggests either the market has settled on Andreeva as a heavy favourite or that insufficient liquidity exists to establish a meaningful consensus line.
Comparable youth-versus-experience matchups in WTA qualifying and main draw rounds typically see the higher-ranked player favoured by 60–75% when the ranking gap exceeds 100 positions. Andreeva's trajectory and tournament seeding status will be critical context; if she enters Cincinnati as a seeded player or recent title contender, the market's extreme positioning becomes more defensible. Conversely, if Oliynykova has recently posted wins against comparable opposition or improved her ranking substantially, value may exist at any price above zero.
Traders should monitor the official Cincinnati draw release, both players' recent match results in the weeks preceding the tournament, and any injury announcements. Andreeva's schedule leading into Cincinnati will signal her preparation level, whilst Oliynykova's performance at preceding European summer events will indicate form. The settlement window closes 23 August 2026, allowing seven days beyond the scheduled date for completion.
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
Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.
Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.
UK Frequently Asked Questions
- 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.
- What does Polymarket cost to trade?
- Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.
- 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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