Granby: Daniel Milavsky vs Duncan Chan

Platform comparison

Market context

Daniel Milavsky faces Duncan Chan in the Granby Challenger, a match originally scheduled for 13 July 2026 at 10:00 ET, where Milavsky is the clear favourite to advance. While sportsbooks like Betvictor list Milavsky at 1/2 (implying roughly 67% probability) and Avabet assigns him a 58% win chance, the prediction market shows a stark divergence with a 100% YES crowd-implied probability for Milavsky advancing. This gap mirrors historical cases in lower-tier tennis where prediction markets, often driven by insider knowledge or rapid sentiment shifts post-schedule confirmation, outpace traditional sportsbooks that lag in updating lines for Challenger events.

Traders should monitor the official ATP Challenger schedule for any delay notices or player withdrawals, as the market resolves to 50-50 if the match is delayed beyond seven days without a winner. Tennis Tonic’s head-to-head analysis, published 14 July, reinforces Milavsky’s edge by predicting a three-set victory with initial odds of 1.50 against Chan’s 2.375, suggesting the 100% market probability may reflect confirmed participation rather than pure form. With the settlement window ending 20 July 2026, the primary catalyst is the match’s actual commencement; any cancellation or tie would invalidate the current odds, making real-time tournament updates critical for assessing the contract’s validity.

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Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 Kalshi vs Polymarket. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Kalshi vs Polymarket trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.