Roland Garros WTA: Veronika Erjavec vs Elena Rybakina

Platform comparison

Active sub-markets

Market context

Elena Rybakina, the world number four and 2022 Wimbledon champion, faces Slovenian qualifier Veronika Erjavec in the opening round of Roland Garros on 24 May 2026. Rybakina has won three WTA titles since the start of 2025 and holds a career record of 3–0 against players ranked outside the top 100, the bracket into which Erjavec currently falls. Erjavec, ranked 187th, has not competed in a Grand Slam main draw since 2023 and has won only four matches at WTA level in the past eighteen months.

The 1% probability assigned to Erjavec reflects the historical rarity of such upsets at Roland Garros. In the past five years, qualifiers have advanced past seeded top-20 players in fewer than 2% of opening-round matchups at the clay-court major. Rybakina's record on clay has strengthened considerably; she reached the semi-finals of the French Open in 2024 and the quarter-finals in 2025, suggesting improved comfort on the surface that historically favoured her opponents.

Traders should monitor Rybakina's fitness status in the week before the match, as she withdrew from the Italian Open in May 2025 with a shoulder concern. Any late coaching adjustments or changes to her preparation schedule would signal confidence or caution. Erjavec's path through qualifying will also matter; a demanding three-match run could leave her fatigued, whilst a straightforward progression might suggest sharper form than her ranking indicates.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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.

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.