U.S. Open No. 3 seed Félix Auger-Aliassime unravels in upset loss to Karen Khachanov

Third-seeded Félix Auger-Aliassime was eliminated in the second round of the 2025 U.S. Open on Thursday, losing 6-7(5), 6-3, 6-2, 6-2 to Russia's Karen Khachanov on Louis Armstrong Stadium. The 26-year-old Canadian, who reached the semifinals at last year's U.S. Open, began experiencing dizziness and visual disturbances midway through the second set and was unable to recover competitively. Auger-Aliassime stated after the match that the symptoms were abnormal and that he would undergo medical testing.