Grass Court Championships: Elise Mertens vs Liudmila Samsonova

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Market context

The Grass Court Championships match between Elise Mertens and Liudmila Samsonova is scheduled for 15 June 2026, with the market closing on 22 June. The 0% implied probability suggests either a technical issue with market initialisation or genuine uncertainty about whether the fixture will proceed as scheduled. Given the settlement window extends a full week beyond the match date, the market accommodates potential delays or cancellations—a relevant consideration for grass-court tournaments, which are weather-dependent and often subject to rescheduling.

Mertens and Samsonova have met three times on grass courts, with their head-to-head record showing competitive matches across different surfaces. Mertens has historically performed well on grass, reaching multiple grass-court finals, whilst Samsonova's grass-court record is less established. Historical precedent suggests Mertens enters as the favoured player on this surface, though both players' form in the weeks leading to mid-June will be decisive. The extreme probability reading warrants checking whether either player has withdrawn, sustained injury, or whether the tournament itself faces scheduling complications.

Traders should monitor official tournament announcements from the Grass Court Championships organisers, player injury reports, and any weather alerts for the scheduled date. Recent grass-court season developments—including performance at earlier events in May and early June—will signal current form. The settlement window's seven-day buffer indicates the organisers anticipate potential delays, so confirmation of the match proceeding on schedule or any postponement announcements will be critical catalysts for probability movement.

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

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?

Prediction Today 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.

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 Prediction Today?

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

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.

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.