Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via BTC Prediction) Pick polygram.ink (preferred broker) |
76% | 24% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Open live market → |
Polymarket (direct) polymarket.com |
76% | 24% | 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: Frances Tiafoe vs Felix Auger-Aliassime Match O/U 21.5 | 76% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Match O/U 23.5 | 56% |
| Completed Match | 50% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Set 1 O/U 8.5 | 50% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Set 2 O/U 8.5 | 50% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Set 1 O/U 9.5 | 50% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Set 2 O/U 9.5 | 50% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Match O/U 22.5 | 50% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Set 1 O/U 10.5 | 50% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Set 2 O/U 10.5 | 50% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Total Sets: O/U 2.5 | 44% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Set 1 Winner | 43% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Set 2 Winner | 39% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime | 36% |
| Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime Set Handicap +/-1.5 | 35% |
Market context
Frances Tiafoe and Félix Auger-Aliassime are set for a Cincinnati Open round-of-16 meeting on hard court, after Auger-Aliassime beat Juan Manuel Cerúndolo 7-5, 6-1 and Tiafoe came through a three-set win over Learner Tien. The market’s 34% YES price sits well below Tennis.com’s projected 65% for Auger-Aliassime, which matches the Canadian’s edge in the head-to-head and his higher seed; that gap is the key reason the contract is not pricing Tiafoe as a live favourite.
For this kind of event, the main comparable case is a match that is announced and then played on the posted day: settlement is straightforward if one player advances, but a no-contest or a delay beyond seven days pushes the market to 50-50 under the contract terms. The on-chain angle matters mainly through timing rather than tennis quality: if the match is completed before the settlement window closes on 27 August, the outcome should resolve cleanly in USDC; if the fixture is pushed off the schedule, the binary narrows to the contract’s fallback state.
The main catalysts are the official order of play and any late fitness or scheduling changes, especially because this match was slated for the evening session and the tournament’s round-of-16 slate falls on 19 August. Cincinnati’s draw has already placed both players in the same section, so the only material dependencies are a last-minute withdrawal, a weather or court backlog delay, or any change to the published start time. For traders reading broader market conditions, BTC and ETH are secondary unless there is a wider risk-off move that affects prompt USDC deployment or liquidity around the event window.
Methodology
This page reads Cincinnati Open: Frances Tiafoe vs Felix Auger-Aliassime on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.
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
- 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.
- 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%.
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