Cincinnati Open: Juan Manuel Cerundolo vs Felix Auger-Aliassime

Platform comparison

Market context

The Cincinnati Open, held annually in Ohio as part of the ATP Masters 1000 calendar, will feature a first-round matchup between Argentine left-hander Juan Manuel Cerundolo and Canadian Felix Auger-Aliassime on 18 August 2026. A YES share on this market pays out if Cerundolo wins; a NO share pays out if Auger-Aliassime advances. The current 20% implied probability for Cerundolo reflects the market's assessment that Auger-Aliassime enters as the favoured player. Traders holding YES shares profit if Cerundolo upsets the expectation; those holding NO shares profit if Auger-Aliassime performs to form.

Auger-Aliassime has established himself as a consistent top-50 player with multiple ATP titles and regular deep runs at Masters events, whilst Cerundolo, his younger brother Sebastián's peer on tour, has shown promise but remains less established at this level. Head-to-head records and recent form on hard courts—Cincinnati's surface—typically favour higher-ranked players in opening rounds, which contextualises why the market assigns Cerundolo only a one-in-five chance. Comparable first-round matchups between established Masters regulars and rising challengers historically see the favourite prevail roughly 75–80% of the time.

Key variables to monitor include injury updates in the fortnight before the tournament, recent hard-court results from both players at ATP 500 or Masters events, and any late-draw changes. Weather disruptions could delay the match beyond the 7-day window, triggering a 50-50 resolution. Cerundolo's performance at tune-up events in early August will signal whether he arrives in Cincinnati with momentum capable of challenging Auger-Aliassime's baseline consistency.

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 Prediction Market UK, 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 Prediction Market UK. 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%.