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

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Active sub-markets

Market context

Pierre-Hugues Herbert and Leandro Riedi are due to meet in Roland Garros qualifying, with the market already pricing a near-certain outcome in Riedi’s favour. The crowd-implied probability is effectively 100% Yes on the incumbent market direction, but the exchange-style pricing in the search results points to a more normal read: Riedi is the favourite, though not overwhelmingly so. Sportsbook lines have Riedi around 1.28 for the match, with Herbert about 3.25, while set markets also lean to the Swiss player. That profile suggests consensus is on Riedi progressing, but not on a routine straight-sets stroll.

For context, Herbert’s main edge in this sort of match is experience and familiarity with clay at Roland Garros, where he has repeatedly stayed competitive enough to drag matches beyond the shortest price. Recent data cited in market previews shows Herbert has gone over 11.5 games in 16 of his last 17 Roland Garros matches, which is one reason totals are being shaded towards over 21.5 rather than a clean favourite sweep. That leaves a plausible contrarian angle in Herbert covering games or taking a set, even if Riedi is still the likelier winner on balance.

The main things to watch are the final start time, any late injury or retirement news, and whether the match is played at all before the settlement window closes. Sofascore listed the match for 22 May at 09:00 UTC, while sportsbook markets were still active around the same time, so any significant delay, walkover, or cancellation would matter more here than marginal form notes. FanDuel and Sportsbet both showed Riedi favoured but not by a landslide, which is the clearest sign that the consensus is on Riedi advancing, with value only if Herbert’s clay-court resistance turns the match longer than expected.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

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

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

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.

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.

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.