Khachanov stuns Auger-Aliassime at US Open; Swiatek, Osaka advance

Khachanov's triumph over Auger-Aliassime marked one of the tournament's standout results, with the Russian capitalizing on his opponent's apparent physical struggles. The Canadian top seed appeared hampered by what observers described as unusual physical issues that disrupted his rhythm and effectiveness on court.

The match showcased a significant disparity in performance levels, with Khachanov maintaining consistency while Auger-Aliassime found himself unable to compete at his usual standard. Despite his seeding and pedigree, the Canadian's physical challenges proved decisive in the outcome.

Elsewhere on the court, Poland's Iga Swiatek and Japan's Naomi Osaka both progressed without major complications. Their victories came through dominant performances that demonstrated the sort of consistency expected from established competitors at one of tennis's major championships.

The results have reshaped the tournament landscape, with Khachanov's upset victory signalling that seeding may offer limited protection when physical fitness becomes a concern. Swiatek and Osaka's comfortable wins position both players favourably in their respective draw halves as the tournament develops.