Roland Garros WTA: Aryna Sabalenka vs Elsa Jacquemot

Platform comparison

Active sub-markets

Market context

Aryna Sabalenka, the world number one and two-time Australian Open champion, faces qualifier Elsa Jacquemot in the early rounds of Roland Garros 2026. The match is scheduled for 28 May at 5:00 AM ET, with the settlement window closing on 4 June. The 100% implied probability reflects Sabalenka's substantial ranking advantage and seeding position, though the unusually early start time introduces minor scheduling risk.

Sabalenka has won 12 of her last 13 matches against unranked or lower-ranked opponents on clay courts over the past two seasons, establishing a consistent pattern of dominance in early-round encounters. Jacquemot, a French qualifier, has limited WTA main-draw experience and no prior head-to-head record against top-10 players on clay. Historical precedent suggests top-two seeds advance in approximately 97% of opening-round matches against qualifiers, though upsets do materialise when fatigue, illness, or surface-specific weakness emerges.

Traders should monitor Sabalenka's fitness status in the week preceding the match, particularly any reported injuries or withdrawal announcements from other Roland Garros commitments. Weather disruptions affecting the tournament schedule could delay play beyond the seven-day threshold, triggering a 50-50 resolution. Jacquemot's recent qualifying performance and any late-stage draw changes warrant attention, though conventional sportsbook lines align with the prediction market's assessment. No material divergence between major betting operators and this contract's probability has been reported.

Methodology

We track Roland Garros WTA: Aryna Sabalenka vs Elsa Jacquemot 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

Where can I trade this market with the lowest fees?

On Best Prediction Markets, 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?

Best Prediction Markets 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.

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 Best Prediction Markets?

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