Roland Garros WTA: Hanyu Guo vs McCartney Kessler

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Active sub-markets

Market context

Hanyu Guo and McCartney Kessler are scheduled to meet in the first round of Roland Garros women's singles on 25 May 2026. The 0% implied probability reflects either minimal trading activity on this contract or a strong consensus that one player will not compete. Guo, a Chinese player ranked outside the top 200 for much of her career, has struggled to maintain consistent WTA tour presence, whilst Kessler, an American qualifier or lower-ranked entrant, faces similar visibility constraints at major tournaments.

First-round matches at Roland Garros between lower-ranked or unseeded players typically show wide probability spreads across sportsbooks and prediction markets, particularly when one or both players lack recent tournament history or have injury concerns. The 0% reading here suggests traders may be pricing in a withdrawal, late scratching, or scheduling conflict rather than genuine uncertainty about the match outcome. Historical precedent indicates that when prediction markets show extreme probabilities (0% or 100%) for lower-tier professional tennis matches, the underlying driver is often player availability rather than competitive assessment.

Key catalysts include confirmation of both players' acceptance into the draw, any late injury announcements, and weather delays affecting the Roland Garros schedule in late May. The settlement window extends to 1 June, allowing seven days beyond the scheduled date for completion. Traders should monitor WTA rankings updates and qualifying-round results in the weeks preceding the tournament, as these directly determine whether either player reaches Paris. Recent sportsbook lines for comparable first-round women's matches at majors typically reflect 10–30 percentage-point spreads when one player is unseeded or making a rare main-draw appearance.

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.

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.