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,

While Medvedev escaped a fine for the media no-show, the Russian has now been slugged with $122,000 worth of fines for separate outbursts in the tournament. The Russian World No.5 copped a $16,000 fine for breaking a net camera after smashing his racquet into the net during his first-round win.

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

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, 7-6 (4), 6-7 (8), 1-6, 7-6 (10-7 ...

When they resumed, Medvedev broke and served for the victory at 6-5, but Tien wouldn’t cede a thing, broke back, and forced the concluding first-to-10 tiebreaker that he emerged to win shortly ...

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, 7-6 (4), 6-7 (8), 1-6, 7-6 (10-7 ...

Last year's Australian Open runner-up, Daniil Medvedev, will not repeat that result during the current campaign. After a massive battle, world no. 5 fell in the second round to Learnen Tien, suffering an early loss and heading home.

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).

Learner Tien pulled off a massive upset against Daniil Medvedev at the Australian Open. So, who is Tien, the 19-year-old out of California?

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

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,

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