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 ...
Jannik Sinner reclaimed the China Open to lift his third title of the season, and first outside of the grand slams, as the Italian defeated 19-year-old Learner Tien 6-2 6-2 in Beijing. Sinner lost the ...