Another day, another teenager ousting a top-10 player at the 2025 Australian Open. That has been the theme of the year's first major, with Brazilian Joao Fonseca defeating No. 9 Andrey Rublev, Czech teenager Jakub Mensik ousting No. 6 Casper Ruud, and now, American teenager Learner Tien taking down No. 5 Daniil Medvedev.

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

The 19-year-old American upset fifth-seeded Daniil Medvedev in a five-set Australian Open marathon that lasted nearly five hours.

Learner Tien, a 19-year-old, became the youngest American man since Pete Sampras to reach the Australian Open third round, beating Daniil Medvedev. The marathon match lasted nearly five hours. Tien's audacity and skill led to an unexpected victory against a seasoned player,

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

Learner Tien beats Daniil Medvedev, is youngest American man in Australian Open’s 3rd round since Pete Sampras in 1990.

U.S. 19-year old Learner Tien defeated No. 5 Daniil Medvedev in a fifth set tiebreaker in the Australian Open, making history in Melboune.

MELBOURNE, Australia (AP) — Learner Tien beats Daniil Medvedev, is youngest American man in Australian Open’s 3rd round since Pete Sampras in 1990.

The outcome was eyebrow-raising because of the wide gulf in experience and accomplishments between the two players at Margaret Court Arena.

French veteran Gaël Monfils rolled back the years to stun the USA’s No. 4 seed Taylor Fritz in the third round of the Australian Open on Saturday, winning 3-6 7-5 7-6(1) 6-4 after three hours and eight minutes of scintillating tennis.

Jannik Sinner continues Australian Open defence with straightforward win; Gael Monfils, 38, dumps out fourth seed Taylor Fritz; American teen sensation Learner Tien also progresses in Melbourne; watch