Libema Open: Ajla Tomljanovic vs Dayana Yastremska

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Market context

The Libema Open grass-court tournament in 's-Hertogenbosch will host a second-round encounter between Australian Ajla Tomljanovic and Ukrainian Dayana Yastremska on 11 June 2026. Both players compete regularly on the WTA circuit, with Tomljanovic holding a career record of grass-court appearances across multiple seasons, whilst Yastremska has shown variable form on faster surfaces. The 100% crowd-implied probability suggests near-certainty that the match will proceed as scheduled, though the early morning start time (4:00 AM ET) reflects European tournament scheduling rather than any fixture risk.

Historical precedent for matches between these two players and their respective grass-court performances provides context for reading this probability. Tomljanovic has competed in numerous grass tournaments with mixed results, whilst Yastremska's record on grass shows inconsistency compared to her clay-court performances. The settlement window extends to 18 June, allowing a seven-day buffer beyond the scheduled date—a standard provision that typically resolves in favour of match completion given modern tournament infrastructure and broadcasting commitments.

Traders should monitor official tournament announcements regarding player withdrawals or injury updates in the week preceding the match. The Libema Open typically maintains its schedule without significant delays, and both players' participation in qualifying or earlier rounds would confirm their fitness. Any late withdrawal by either competitor would trigger the 50-50 resolution clause, though such occurrences remain uncommon at established grass-court events with confirmed draws.

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Sport Prediction, 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?

Sport Prediction 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'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.

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.