Cincinnati Open: Arthur Fery vs James Duckworth

Platform comparison

Market context

Arthur Fery’s meeting with James Duckworth at the Cincinnati Open sits in the middle of a market that has already treated Fery as the marginal favourite, even though the crowd-implied probability on this contract is pinned at 100% YES. Tennis.com had Fery at 58% projected to win against 42% for Duckworth, while Dimers priced him at 52% and Tennis Tonic’s early outright line showed Fery around 1.53 against 2.49 for Duckworth. Other model-style pages were more bullish on Fery, but not to the level implied by a unanimous YES price, which suggests the contract is trading well ahead of the broader analyst split.

The historical frame matters because this is a typical ATP Masters 1000 second-round mismatch between a higher-ranked player and a qualifier-like underdog, yet not a clean one: Duckworth has the stronger head-to-head record in some previews, while Fery’s recent form and ranking narrative have pulled opinion back towards him. Comparable markets in tennis often swing sharply when a player is a late withdrawal, a retirement risk, or a walkover candidate, and that is especially relevant here because the contract settles 50-50 if the match is cancelled, never starts, or is delayed beyond seven days. The event page and live score feeds indicate the match was scheduled for 15 August, with live coverage listings and tournament scoreboards implying the main catalyst is simple completion, not a major news shock.

Traders should watch for any official tournament updates on court assignment, start time changes, or medical retirement notes, because those are the outcomes that can break a near-certain YES into a binary reset. With settlement open until 22 August, the main dependency is whether the match is actually played to a winner within the window, rather than whether one player looked favoured on paper.

Sources: 1 · 2 · 3 · 4 · 5

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 Best Prediction Markets, 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.

FAQ

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 Best Prediction Markets. 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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.