Thrilling Matches and Major Upsets Mark U.S. Open's Fifth Day

The fifth day of the U.S. Open saw major upsets and thrilling matches. Notably, defending champion Novak Djokovic was knocked out by Australia's Alexei Popyrin. Aryna Sabalenka and Elise Mertens advanced to the fourth round, along with Frances Tiafoe, who won a tight five-set match against Ben Shelton.

The fifth day of the U.S. Open at Flushing Meadows was rife with excitement and drama. Highlighting the day was Novak Djokovic's unexpected exit as the defending champion was defeated by Australia's 28th seed Alexei Popyrin in four sets.

In other notable matches, Aryna Sabalenka, the Australian Open champion, moved to the fourth round after overcoming a first-set scare to beat Ekaterina Alexandrova. Sabalenka is set to face Elise Mertens, who advanced by defeating 14th seed Madison Keys.

Frances Tiafoe emerged victoriously in an all-American five-set thriller against Ben Shelton. This victory propels Tiafoe into the next round, where he is slated to face Alexei Popyrin. The tournament continues to promise high drama and unexpected turns.

(With inputs from agencies.)