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

Daniil Medvedev ripped 24 aces and converted six break points to outlast Kasidit Samrej in a 3-hour, 8-minute first-round victory Tuesday at the 2025 Australian Open. No. 9 Andrey Rublev was the latest upset victim.

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

Learner Tien, a 19-year-old qualifier from California, notched the biggest upset of the 2025 Australian Open to date by beating 2024 finalist and No. 5 seed, Daniil Medvedev in five sets, 6-3, 7-6(4),

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 Daniil Medvedev in five sets on Thursday.

Last year's runner-up Daniil Medvedev was dumped out in the Australian Open second round early Friday morning by 19-year-old qualifier Learner Tien in a massive Melbourne shock.In his debut Australian Open,

Three-time Australian Open finalist Daniil Medvedev's hopes for a fourth final were dashed in a stunning second-round exit on Thursday, as he was defeated by American qualifier Learner Tien in a dramatic five-set contest at Margaret Court Arena.