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,

Daniil Medvedev is out of the Australian Open after being bested by American qualifier Learner Tien, who was forced to conduct an awkward post-match interview.

Daniil Medvedev praised his Australian Open first round opponent Kasidit Samrej after being stretched to five sets by the 418th-ranked Thai wildcard before winning 6-2 4-6 3-6 6-1 6-2 on Tuesday.

American teen Learner Tien pulled off the biggest upset so far at the 2025 Australian Open, ousting Russian Daniil Medvedev -- the No. 5 player in the world -- in a 4-hour, 49-minute thriller at Margaret Court Arena.

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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

The 19-year-old who was a late qualifier to the Grand Slam secured the biggest win of his young career on Thursday

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

The Russian champion - who reached three finals at Melbourne Park - played a really fluctuating match against 19-year-old American Tien, surrendering in the fifth set after he had turned the inertia of the challenge thanks to the physical decline of his opponent.

Built looks to build on his Kentucky Derby credentials Saturday in New Orleans; two of December's heros return to Group 1 action in Hong Kong.

Learner Tien, a 19-year-old qualifier from California, became the youngest American man to reach the Australian Open's third round since Pete Sampras in 1990, upsetting a racket-tossing Daniil Medvedev 6-3,