Libema Open: Felix Auger-Aliassime vs Kamil Majchrzak

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Market context

The Libema Open grass-court tournament in 's-Hertogenbosch will host a first-round match 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 clear favourite on surface and ranking differential. Majchrzak, a lower-ranked player who typically competes outside the ATP's elite tier, would require a significant upset to progress. The 0% crowd probability reflects the substantial gap in recent form and head-to-head record between the two competitors.

Historical precedent matters when evaluating grass-court upsets at secondary ATP 250 events. Majchrzak has won matches at this level before, but consistency against top-20 opponents remains sparse in his record. Auger-Aliassime's grass-court record shows improvement year-on-year, particularly in early-round matches where he avoids fatigue-related dips. Similar matchups at Libema—lower-ranked qualifiers against seeded Canadians—have favoured the higher-ranked player in approximately 85% of cases over the past five seasons.

Traders monitoring this market should track official draw confirmations and any late withdrawals from either player through the ATP's injury-report channels. Grass-court surfaces can produce unexpected results if weather delays the match significantly or if Auger-Aliassime arrives with undisclosed fitness concerns. The settlement window extends to 19 June, allowing a seven-day buffer for rescheduling. Programmatic traders should flag any changes to Auger-Aliassime's ranking status or Majchrzak's recent tournament results in the week prior, as these could shift implied probabilities meaningfully from the current floor.

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 App UK, which mirrors the Polymarket order book directly.

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 App 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 App 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.

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 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.