became the youngest American man to reach the Australian Open's third round since Pete Sampras in 1990, upsetting a racket-tossing Daniil Medvedev 6-3, 7-6 (4), 6-7 (8), 1-6, 7-6 (10-7 ...

For Learner Tien, Thursday, January 16, was special after he defeated three-time finalist Daniil Medvedev in the ... the youngest American man since Pete Sampras in 1990 to advance to the third ...