Jannik Sinner’s withdrawal with a right knee injury has reshaped the men’s draw at the 2026 US Open, where main-draw action begins August 30 on outdoor hard courts. Carlos Alcaraz returns from a four-month right wrist layoff as defending champion, while Alexander Zverev assumes the top seed and benefits from strong recent hard-court results. American players such as Ben Shelton and Taylor Fritz enter with momentum from summer titles and consistent hard-court performances, though early-round matchups and potential fatigue from the North American swing remain variables. The quarterfinal stage, scheduled for September 8-9, rewards depth in best-of-five sets and favors those with proven recovery between rounds amid a compressed schedule.