Rising American star Alex Michelsen has pulled off another surprise victory to reach the fourth round of the Australian Open. The 20-year-old backed up his first-round upset of world #11 and 2023 Australian Open runner-up Stefanos Tsitsipas with a straight-sets demolition of 19th seed Karen Khachanov on Saturday,

Alex Michelson joked that he was too busy at the Australian Open on Saturday morning to have a lengthy phone conversation with his mother back home in California. His excuse was pretty good, actually: The 20-year-old Michelsen was on court for a 6-3,

Alex Michelsen, part of a group of Americans making an impact at the Australian Open, defeated No. 19 seed Karen Khachanov to reach the round of 16.

Learner Tien has become the youngest American man to reach the Australian Open’s third round since Pete Sampras in 1990

At the age of 19, Learner Tien defeated Daniil Medvedev in a five-set thriller that finished just before 3 a.m. in Melbourne.

American Learner Tien upset No. 5 seeded Daniil Medvedev 6-3, 7-6 (4), 6-7 (8), 1-6, 7-6 (10-7) at the 2025 Australian Open, in a 4-hour, 49-minute match that began Thursday night and ended early Frid