U.S. teen Tien shocks No. 1 Zverev in Acapulco

Learner Tien, a 19-year-old from California, took down top-seeded Alexander Zverev 6-3, 6-4 to advance to the Acapulco Open quarterfinals.

U.S. teen Tien shocks No. 1 Zverev in Acapulco
Learner Tien, a 19-year-old from California, took down top-seeded Alexander Zverev 6-3, 6-4 to advance to the Acapulco Open quarterfinals.