Cincinnati Open: Juan Manuel Cerundolo vs Felix Auger-Aliassime

Platform comparison

Market context

Juan Manuel Cerundolo, the Argentine left-hander ranked outside the top 100, faces Canadian Felix Auger-Aliassime in the Cincinnati Open's early rounds on 18 August 2026. Polymarket currently prices Cerundolo's advancement at 25 cents per share, implying roughly a one-in-four chance he progresses past Auger-Aliassime. The conditional token structure on Polygon means traders holding YES shares collect full USDC value only if Cerundolo wins; NO holders profit if Auger-Aliassime advances. Settlement occurs by 25 August, allowing a seven-day buffer for rescheduling before the market resolves to 50-50 parity.

Auger-Aliassime's career record against lower-ranked opponents shows mixed results; he has stumbled against unseeded players in Masters 1000 events, though he typically prevails when healthy. Cerundolo broke into the top 100 in 2023 but has struggled with consistency on hard courts, his preferred surface. The 25% probability reflects Auger-Aliassime's ranking advantage and recent form, yet Cerundolo's left-handed serve and aggressive baseline game create genuine upset potential in a single-set format.

Traders should monitor draw confirmations and injury reports through mid-August. Cincinnati's hard-court conditions favour Auger-Aliassime's power game, whilst humidity and court speed variations can disrupt rhythm. Any last-minute withdrawals or schedule shifts beyond the seven-day window trigger the 50-50 resolution clause, making fixture confirmation critical for position management on Polygon.

Methodology

This page reviews Cincinnati Open: Juan Manuel Cerundolo vs Felix Auger-Aliassime across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Scam?, which mirrors the Polymarket order book at 0% fees.

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

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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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%.