Giant-killing Alex Michelsen can scarcely believe he's reached the Australian Open fourth round after pulling off a Pete ...

On late Thursday night, 19-year-old American Learner Tien taught three-time Australian Open runner-up and fifth seed Daniil ...

Learner Tien, a 19-year-old from California, toppled No. 5 seed Daniil Medvedev at the Australian Open. He’s now the youngest ...

Learner Tien, a 19-year-old qualifier from California, became the youngest American man to reach the Australian Open's third ...

A series of jaw-dropping upsets of top 10 players at the Australian Open by fearless teenagers has fuelled excitement at the future of men's tennis as the old guard fades into history.

Learner Tien, 19, became the youngest American man to reach the Australian Open's third round since Pete Sampras in 1990.

Learner Tien achieved an unprecedented feat in the past 20 years following his stunning victory over Daniil Medvedev in the ...

American qualifier Learner Tien shocked the tennis world on Thursday when he upset last year's Australian Open runner-up Daniil Medvedev in a nearly five-hour, five-set match in the second round.