Libema Open: Felix Auger-Aliassime vs Kamil Majchrzak

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Active sub-markets

Market context

The Libema Open grass-court tournament in 's-Hertogenbosch will host a first-round clash between Canadian Felix Auger-Aliassime and Polish qualifier Kamil Majchrzak on 12 June 2026. Auger-Aliassime, ranked in the top 20 globally, enters as the heavy favourite; Majchrzak, a journeyman competitor outside the top 100, has limited grass-court pedigree. The 0% implied probability reflects the substantial gap in seeding and recent form, though such extreme valuations often signal shallow order-book depth rather than certainty of outcome.

Historical precedent shows that grass-court upsets at secondary ATP 250 events occur at measurable frequency—roughly 15–20% of matches involving top-20 players against unranked qualifiers end in upset victories. Auger-Aliassime's record on grass is solid but not dominant; he has reached one ATP grass final and typically peaks at the quarter-final stage. Majchrzak's qualification path and recent tournament appearances will determine whether he arrives match-sharp or fatigued, a variable that shifts the true probability meaningfully above zero.

The settlement window closes 19 June 2026, allowing seven days for rescheduling should weather or injury intervene. Traders depositing via Klarna or SEPA should monitor the ATP's official draw confirmation and any injury bulletins released in the week before play. Match cancellation or abandonment beyond the seven-day window triggers a 50-50 resolution, creating tail-risk exposure for those holding positions. Liquidity constraints on niche grass-court markets mean withdrawal rails (USDC on-chain settlement or domestic bank transfers) may face delays if the book remains thin; early position-sizing accordingly reduces friction at exit.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Klarna UK, which mirrors the Polymarket order book directly.

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 Polymarket Klarna 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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Polymarket Klarna UK triggers a quick verification flow that finishes in minutes.