Roland Garros ATP: Alejandro Tabilo vs Kamil Majchrzak

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Market context

Alejandro Tabilo faces Kamil Majchrzak in the first or second round of Roland Garros in May 2026, with the market pricing Tabilo's advancement at 98 per cent. The Chilean sits around 20th in the ATP rankings, whilst Majchrzak, a Polish player who has battled consistency issues, typically ranks outside the top 50. On seeding alone, Tabilo enters as the clear favourite, though the extreme probability leaves minimal room for upset scenarios.

Tabilo's recent trajectory shows steady improvement on clay surfaces, where Roland Garros is contested. He reached the quarter-finals at Buenos Aires in early 2025 and has demonstrated competitive depth against higher-ranked opponents in ATP 500 events. Majchrzak, conversely, has struggled with form and injury management over the past two seasons, with limited success at Grand Slam level. Historical data suggests unseeded or lowly-seeded Polish players rarely trouble top-20 opponents at Roland Garros, though occasional upsets do occur when fatigue or surface preference favour the underdog.

The settlement window extends to 31 May, providing a seven-day buffer beyond the scheduled 24 May date. Traders should monitor injury reports in the fortnight preceding the match, as both players' fitness status could shift the narrative. Tabilo's clay-court preparation schedule and any late-round withdrawals from earlier tournaments would signal confidence levels. The 98 per cent probability reflects conventional seeding logic, leaving minimal value for Tabilo backers unless Majchrzak enters with documented injury concerns. Contrarian interest would centre on whether Majchrzak has secured recent clay-court wins or training partnerships that might tighten the match.

Methodology

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Resolution & payout

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FAQ

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On Who Will Win, 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?

Who Will Win 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.