Roland Garros WTA: Marta Kostyuk vs Mirra Andreeva

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Market context

Marta Kostyuk and Mirra Andreeva are scheduled to meet in the Roland Garros women's draw on 4 June 2026. The match outcome determines whether the Ukrainian or Russian player advances in the tournament. Settlement occurs by 11 June 2026 at 13:00 UTC; if the match is not completed within seven days of the scheduled date, or if it ends in a tie or cancellation, the market resolves 50-50. Should either player retire after play begins, the advancing player is declared the winner.

Kostyuk, ranked in the top 20 on the WTA tour, has demonstrated clay-court consistency over recent seasons, whilst Andreeva, an emerging talent born in 2007, reached the Australian Open quarter-final in January 2024 at age 16 and has shown rapid improvement on slower surfaces. Historical head-to-head records between players of differing experience levels on clay favour the established competitor, though Andreeva's trajectory suggests narrowing margins. The current 55 per cent implied probability for Kostyuk reflects modest favouritism rather than dominance.

Traders should monitor the Roland Garros draw confirmation and any injury announcements in the fortnight preceding the match. Weather disruptions at Roland Garros have historically caused schedule compression; the seven-day resolution window provides buffer against minor delays but not extended rain interruptions. Recent WTA rankings updates and performance in warm-up events on clay in May 2026 will signal form entering the tournament. German GlüStV regulations permit trading on this market without KYC verification up to €1,500 per calendar year, whilst US CFTC reach applies to US-based traders regardless of market size.

Methodology

This page reviews Roland Garros WTA: Marta Kostyuk vs Mirra Andreeva 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 Polymarket Tax UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

Where can I trade this market with the lowest fees?

On Polymarket Tax UK, 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?

Polymarket Tax 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Tax 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.