Roland Garros, Qualification ATP: Pierre-Hugues Herbert vs Leandro Riedi

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Market context

Pierre-Hugues Herbert and Leandro Riedi were due to meet in Roland Garros qualifying today, and the main short-term change is that the market is now trading with the outcome effectively priced as certain after the match has moved into the settlement window. FanDuel and Kalshi both had the fixture listed for 22 May, while live-score listings from SofaScore and Flashscore show the match as scheduled in Paris, which matters because a no-show, cancellation or delay beyond the seven-day window would still flip settlement to 50-50.

The head-to-head is a useful frame for the 100% crowd view. TennisRatio records the pair at 1-1 in professional meetings, with Riedi having won their most recent match in April. That sort of split does not usually justify an absolute price on its own, but it does explain why traders have had little reason to move away from a binary view once the draw and schedule were confirmed. Herbert is the older player and the higher-ranked of the two on the TennisTemple listing, while Riedi has been the more recent winner in the matchup.

What matters now is not form debate but execution: final match start time, any court assignment changes, and whether the contest begins at all. In qualifying, weather and court backlog are the usual dependencies, especially at Roland Garros where schedule compression can push lower-priority matches around. If organisers issue a delay or rescheduling notice, that is the main catalyst that could still alter settlement; absent that, the market remains anchored to the match being played and one side advancing.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

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

Where can I trade this market with the lowest fees?

On PolyGram, 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?

PolyGram 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 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.