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 from California, became the youngest American man to reach the Australian Open's third round ...

Novak Djokovic's Serbian standout protege Olga Danilovic dominated Jessica Pegula in the third round of the Australian Open ...

Australian Open marks the first Grand Slam of the tennis season. Much has changed since the most recent Slam, the U.S. Open ...