Ben Shelton produced the shock of the 2026 US Open quarter-finals, defeating defending champion Carlos Alcaraz in a marathon midnight clash that raised fresh questions about scheduling at the Grand Slam. The American's stunning run sets up a possible first men's title for the US since 2003. On the women's side, Elena Rybakina claimed the world No. 1 ranking for the first time by defeating Zheng Qinwen 3–6, 6–1, 6–4, ending Aryna Sabalenka's 99-week reign at the top. Coco Gauff survived a thrilling comeback to reach the semis, saving two match points against Mirra Andreeva before rallying to win 2–6, 7–6 (7), 6–2, setting up a clash with Rybakina.
Rybakina will face Gauff in the semi-finals, while Shelton carries American hopes into the last four. Alexander Zverev reached the men's semis after a rocky start, and Karen Khachanov advanced when Alexander Blockx retired midway through the third set. On the doubles front, Joe Salisbury and Rajeev Ram reached the semis by defeating defending champions Marcel Granollers and Horacio Zeballos. Meanwhile, Max Purcell, the Australian grand slam doubles champion returning from an 18-month anti-doping suspension, has been named to Australia's Davis Cup squad for their tie against Poland in Brisbane. The US Open continues with semifinals this week.