Libema Open: Felix Auger-Aliassime vs Kamil Majchrzak

Platform comparison

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 against Majchrzak, a journeyman competitor typically operating outside the top 100. The 0% implied probability across prediction markets reflects the substantial gap in playing strength, though the settlement window extending to 19 June allows for scheduling disruptions common on the grass circuit.

Auger-Aliassime's record against lower-ranked opponents on grass remains strong, though early-round upsets occur at roughly 8–12% frequency in ATP 250 tournaments when seeding gaps exceed 50 positions. Majchrzak has won only three ATP matches since 2023 and holds no grass-court titles in his career. Historical precedent suggests markets pricing this below 5% underestimate tail risk from injury withdrawals, weather delays, or unexpected form collapse. On Kalshi, where decimal odds convert more transparently than Polymarket's probability slider interface, comparable mismatches typically trade 1.02–1.05, whereas Betfair's lay-betting structure often reveals sharper probability estimates from professional traders.

Traders should monitor the official ATP schedule for any rain postponements—the Dutch grass season frequently encounters weather delays—and watch for late injury announcements from either player's camp. Majchrzak's recent tournament appearances and Auger-Aliassime's preparation status heading into the event will emerge in the week prior. The 7-day tie-resolution clause creates arbitrage opportunities if the match is postponed beyond 19 June without completion, triggering the 50-50 settlement condition across all platforms.

Methodology

This page compares Libema Open: Felix Auger-Aliassime vs Kamil Majchrzak specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to Polymarket Alternative, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). Polymarket Alternative routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Is this market available outside the US?

Polymarket Alternative 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.

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.