Learner Tien beats Daniil Medvedev and is the youngest US man in Australia's 3rd round since Sampras
Learner Tien, a 19-year-old qualifier from California, became the youngest American man to reach the Australian Open's third ...
International Tennis Federation44m
Tien becomes third teenager to beat a Top 10 opponent at Aussie Open
By defeating world No. 5 Daniil Medvedev, Learner Tien of the United States has become the third teenager to dispatch a Top 10 opponent at the Australian Open ...