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 ...
Learner Tien upset a fifth-seeded, racket-tossing Daniil Medvedev in the second round of the Australian Open, a five-setter that took nearly five hours.