Roland Garros WTA: Marta Kostyuk vs Mirra Andreeva

Platform comparison

Active sub-markets

Market context

Polymarket's conditional token pricing on Polygon currently implies a 24% probability that Kostyuk advances past Andreeva at Roland Garros, with settlement tied to the 11 June 2026 deadline. The match was originally scheduled for 4 June at 9:00 AM ET, meaning traders are pricing in roughly a week's window for completion before the 50-50 tie-break resolution kicks in. USDC liquidity on this contract reflects moderate trading volume typical of lower-seeded women's clay-court matchups, where surface preference and recent form shifts can move prices sharply once draw confirmation arrives.

Kostyuk's historical performance on clay sits below her hard-court baseline, though she has shown incremental improvement on the surface over the past two seasons. Andreeva, conversely, emerged as a clay-court threat during 2024–25, reaching quarterfinals at secondary WTA events and demonstrating comfort in extended baseline rallies. Head-to-head records between players in this ranking band often shift with injury status and tournament preparation; comparable seeding scenarios at Roland Garros have seen the younger or fresher player outperform pre-tournament expectations roughly 35–40% of the time when odds favour the older competitor by similar margins.

Traders should monitor official draw confirmation and any late withdrawal announcements, typically released 48–72 hours before scheduled play. Recent WTA scheduling disruptions have occasionally pushed matches beyond initial slots, and clay-court weather delays at Roland Garros remain a material risk through early June. Injury updates on either player's social media or official WTA communications could trigger sharp repricing; Kostyuk's recent match load and Andreeva's preparation intensity heading into the tournament will be critical signals for position adjustments before the settlement window closes.

Methodology

We track Roland Garros WTA: Marta Kostyuk vs Mirra Andreeva 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

Is this market available outside the US?

Kalshi UK 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 does it cost to trade on Kalshi UK?

Zero. Kalshi UK 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, Kalshi UK 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.