Cincinnati Open: Sebastian Baez vs Grigor Dimitrov

Platform comparison

Market context

The Cincinnati Open, held annually at the Western & Southern Open in Mason, Ohio, draws top-ranked players competing for Masters 1000 points in early August. Baez, an Argentine left-hander ranked outside the top 50, faces Dimitrov, a Bulgarian former world number three and consistent ATP tour performer. The 8% implied probability on Polymarket reflects the substantial gap in ranking and recent form between the two players, with conditional tokens priced accordingly on Polygon's USDC rails.

Dimitrov has maintained a top-20 ranking through 2025 and typically performs well on hard courts, the surface used at Cincinnati. Baez has shown improvement on the ATP circuit but lacks the consistent results against elite opposition that would justify shorter odds. Historical matchups between players of this calibre differential—where the lower-ranked player holds single-digit probability—rarely see upsets; the 8% figure aligns with empirical data from similar pairings at Masters events over the past three seasons, where underdogs in this probability range advance roughly 5–10% of the time.

Traders should monitor the official Cincinnati Open draw confirmation and any late withdrawals or injury announcements from either player in the week preceding 13 August. Dimitrov's fitness status heading into the tournament and Baez's performance in qualifying rounds or preceding ATP events will provide real-time signals. The settlement window closes 20 August, allowing seven days beyond the scheduled date for completion; any match delay beyond that triggers a 50-50 resolution, creating a secondary risk factor independent of on-court performance.

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 Polymarket Scam?, 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

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What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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