Learner Tien’s improvement impresses Zverev at Australian Open

MELBOURNE, Australia — The Michael Chang influence on Learner Tien’s tennis has people talking about what is possible for the 20-year-old American. Tien lost his first Grand Slam quarterfinal on Tuesday, to No. 3 Alexander Zverev, but even the 2025 Australian Open runner-up was startled by the difference he’s noticed in a matter of months.