**Carlos Alcaraz’s confirmed participation in the 2026 U.S. Open stems from his official announcement on August 20 after clearing extensive on-court testing of his recovered right wrist.** The defending champion, sidelined since withdrawing from the Barcelona Open in April, completed rigorous practice sessions—including multi-hour workouts with Holger Rune in Murcia—and has already competed in mixed doubles alongside Serena Williams at Flushing Meadows. He faces Roman Safiullin in the first round, with the draw listing him as the No. 2 or 3 seed and no late scratches reported. Trader consensus at 97.8% reflects this verified readiness and absence of any withdrawal signals in the final days before the main draw. Remaining low-probability risks include an acute wrist flare-up in the hours before his scheduled singles debut or a precautionary medical decision, though current evidence from team statements and on-site activity points strongly against these outcomes.