Roland Garros ATP: Adam Walton vs Daniil Medvedev

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Active sub-markets

Market context

Adam Walton, a British qualifier, faces world number four Daniil Medvedev in the opening round of Roland Garros in May 2026. The 17% implied probability on Polymarket reflects Medvedev's substantial ranking advantage and clay-court pedigree, though the exact odds representation differs across platforms—Kalshi typically displays American moneyline odds whilst Betfair and Smarkets use decimal formats, making direct comparison essential for traders evaluating value. Polymarket's fee structure and KYC requirements also influence liquidity depth on lower-profile matchups like this one.

Medvedev has reached multiple Grand Slam finals but historically struggles on clay relative to hard courts; his Roland Garros record shows early exits more often than deep runs. Walton's path to the main draw as a qualifier suggests baseline competence, though facing a top-four player in round one presents an asymmetric challenge. Historical precedent shows qualifiers occasionally upset seeded players at Roland Garros, though the probability skews heavily toward the established competitor. The 17% odds imply roughly a 5–6 to 1 underdog position for Walton across most books.

Traders should monitor Medvedev's pre-tournament fitness announcements and any late schedule adjustments, as clay-court preparation varies significantly among top players. Recent ATP reports through April 2026 will clarify both players' form trajectory. The settlement window extends to 31 May, allowing seven days beyond the scheduled 24 May date—relevant given Roland Garros' history of weather delays. Withdrawal or retirement scenarios trigger the 50-50 resolution clause, a consideration that separates this market's terms from some competitors' handling of incomplete matches.

Methodology

This page compares Roland Garros ATP: Adam Walton vs Daniil Medvedev specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Polymarket Alternative UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Alternative UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket Alternative UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

What does it cost to trade on Polymarket Alternative UK?

Zero. Polymarket Alternative UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.