Roland Garros WTA: Ann Li vs Diane Parry

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Market context

Ann Li and Diane Parry are scheduled to meet in the first round of the Roland Garros women's draw on 28 May 2026. Li, ranked around 60th on the WTA tour, has shown inconsistent form on clay in recent seasons, with early exits at Madrid and Rome in 2025 limiting her preparation time for Paris. Parry, a French player ranked in the 70s, carries home-court advantage and has gradually improved her clay-court record, reaching the second round at Roland Garros in 2024 and 2025.

The 100% implied probability reflects the near-certainty that this match will be played as scheduled. First-round matches at Grand Slams rarely face cancellation or significant delays unless weather becomes severe or a player withdraws due to injury before the tournament begins. Neither Li nor Parry has reported recent injury concerns as of late May 2026, and both are expected to compete. The settlement window extends to 4 June, allowing a seven-day buffer for any unforeseen postponement.

Traders should monitor injury bulletins released by the WTA in the week before the tournament and any last-minute withdrawals from the draw. Parry's performance in warm-up events immediately preceding Roland Garros—particularly at the Strasbourg or Nuremberg tournaments—could signal her confidence on clay. Li's results at Madrid or Rome, if she competed, would provide the most recent form indicator for both players on the surface. Weather forecasts for Paris on 28 May should be tracked, though rain delays rather than cancellations are the typical outcome at Roland Garros.

Methodology

This page reviews Roland Garros WTA: Ann Li vs Diane Parry across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Sport Prediction — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 Sport Prediction, 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.

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 Sport Prediction?

Zero. Sport Prediction 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.