Cincinnati Open: Thiago Agustin Tirante vs Arthur Fils

Platform comparison

Market context

Thiago Agustin Tirante and Arthur Fils are due to meet in a Cincinnati Open quarter-final on outdoor hard court, with the market pricing Fils as the clear favourite and crowd-implied probability sitting well below that at 25% YES. The gap is consistent with the live pre-match lines: Fils is ATP No 21 and Tirante No 50, and the pair have no prior head-to-head record, so the book is leaning on ranking, surface fit and recent form rather than matchup history.[1][2][8]

For programmatic traders, the cleanest read is to treat this as a standard pre-start favourite-versus-underdog market unless there is a schedule change, retirement risk or withdrawal before first serve. Fils has already progressed deep into the event, including a straight-sets win over Mariano Navone in Montreal earlier in August, which supports the view that he has been holding form on the North American hard-court swing.[15] Comparable first-time meetings at Masters level tend to settle around baseline market strength unless one player arrives with visible physical issues or a compressed match schedule.[2][4]

The main catalysts to watch are official order-of-play updates, walkover notices and any delay beyond the scheduled 21 August start time, because a non-start or a delay beyond seven days pushes the market to 50-50 under the settlement rules. Live score services had the match listed for P&G Stadium Court at 00:30 UTC on 21 August, so automation should key off confirmed start and completion status rather than assumed timing.[5][6][13]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Cincinnati Open: Thiago Agustin Tirante vs Arthur Fils 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 Bot UK, 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

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Do I pay tax on prediction market profits in the UK?

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