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

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 qualifier from California, notched the biggest upset of the 2025 Australian Open to date by beating No. 5 seed and 2024 finalist, Daniil Medvedev, in five sets. Tien won 6-3,

American teenager Learner Tien produced arguably the biggest shock of the Australian Open so far as he defeated last year’s runner-up Daniil Medvedev in five sets, 6-3, 7-6 (4), 6-7 (8), 1-6, 7-6 (7).

Daniil Medvedev’s “Dead Fish” celebration at the end of the 2021 U.S. Open final stands out as among the most unusual and unexpected reactions to a major tennis championship

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

In the Australian Open Round of 64 on Wednesday, we have a matchup featuring No. 5-ranked Daniil Medvedev against No. 121 Learner Tien.In Tien’s most recent competition, he fell to Arthur

Daniil Medvedev of Russia reacts during his round 2 match against Learner Tien of USA during the 2025 Australian Open at Melbourne Park in Melbourne, Thursday, January 16, 2025. / IMAGO / AAP ...

American player Ben Shelton has criticized some of the questions and comments made by post-match TV interviewers at the Australian Open after reaching the semifinals at the Grand Slam tennis tournament.

Daniil Medvedev’s meltdown and Danielle Collins’s squabble with the Aussie fans made headlines, while Aryna Sabalenka and Iga Świątek keep rolling.

A YouTube stream of the Australian Open has gone viral for its glitches, but it's also a sign of the future of sports media.