Kalshi traders price Alcaraz at 34% to win US Open after Sinner withdraws
Jannik Sinner withdrew from the 2026 US Open with a knee injury. Kalshi traders now give Carlos Alcaraz a 34% chance to defend his title. Separately, Kalshi is listing a live prediction market on the US Open men's singles match between Luka Pavlovic and Juan Pablo Varillas on August 24, with Pavlovic priced at 72% to win. Both markets reflect the platform's expanding tennis coverage during the tournament. The Sinner withdrawal moved Alcaraz's implied probability significantly. The Pavlovic-Varillas match offers an early morning trading opportunity.
Sinner's withdrawal is a concrete information event that traders must price in real time, or fade if they believe the 34% overstates Alcaraz's actual edge. Tennis injuries create sharpest volatility in individual sports because a single health disclosure reshapes the entire field. Kalshi's Pavlovic-Varillas listing at 72% shows the platform is sequencing match-level markets around withdrawal news, which lets traders move from outrights to specific matchups.
For tennis bettors migrating from sportsbooks, the question is whether Kalshi's pricing stays tight enough to arbitrage against bookmaker lines. The Sinner news also tests how quickly Kalshi resolves pending outright contracts if a player withdraws mid-tournament, a settlement rule most retail users have not yet faced. Alcaraz's 34% will compress or expand with each round he survives, making this a tracking market for tennis liquidity depth through the final.