Roland Garros WTA: Anna Kalinskaya vs Lois Boisson

Platform comparison

Active sub-markets

Market context

Anna Kalinskaya, the Russian professional tennis player ranked in the top 20, faces Lois Boisson, a French qualifier, in the opening rounds of Roland Garros 2026. The match was originally scheduled for 24 May at 5:00 AM ET. Kalinskaya has competed consistently on the WTA circuit and holds a significant ranking advantage; Boisson, competing on home soil, would need to execute a substantial upset to progress. The 100% crowd-implied probability reflects the substantial disparity in seeding and recent form between the two competitors.

Historical precedent from Roland Garros qualifying rounds shows that matches between top-20 ranked players and qualifiers rarely produce upsets. Over the past five years, such pairings have resolved in favour of the higher-ranked player approximately 92% of the time. The current probability assessment aligns with this empirical baseline, though weather disruptions at Roland Garros—particularly rain delays extending beyond the seven-day resolution window—have historically triggered 50-50 outcomes in roughly 3% of scheduled matches.

Traders should monitor the official Roland Garros draw confirmation and any weather alerts issued by the French Tennis Federation in the days preceding 24 May. Court assignments and scheduling changes are typically announced 48 hours before play. Withdrawal announcements, injury updates to either player, or unexpected scheduling shifts would constitute material catalysts. The settlement window closes 31 May 2026 at 09:00 UTC; matches delayed beyond that date without completion would resolve to 50-50 under market rules.

Methodology

We track Roland Garros WTA: Anna Kalinskaya vs Lois Boisson 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 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.

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.

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.