Roland Garros, Qualification ATP: Toby Samuel vs Gonzalo Bueno

Platform comparison

Active sub-markets

Market context

Toby Samuel and Gonzalo Bueno meet in Roland Garros qualifying, with the market currently pricing a 0% chance on Samuel and therefore treating Bueno as the clear expected winner. That is a strong consensus signal, but it also means the book is effectively assuming a straight-through result rather than a competitive clay match. The historical frame is limited: the pair have met once before in professional play, with Bueno leading 1-0 after their October 2025 meeting. For a qualifier, that earlier head-to-head matters more than usual because small sample sizes and surface-specific form can move the line sharply if one player has already shown he can handle the matchup.

The main catalysts are the final entry list, the published order of play, and whether both players are confirmed to start on the scheduled day, since delay or non-completion rules can convert an unsettled match into a 50-50 resolution. Recent listings from ATP and sportsbook boards show the match on the Roland Garros qualifying slate, while live score and odds pages indicate it is being tracked as an active event rather than a speculative placeholder. The value debate, if any, sits with the underdog only if Samuel’s recent clay form and serve hold up better than the market expects; otherwise the consensus remains with Bueno, who is the more natural default on surface and prior head-to-head.

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Methodology

We track Roland Garros, Qualification ATP: Toby Samuel vs Gonzalo Bueno on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

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.

What does it cost to trade on PolyGram?

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

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.