Tien reached two junior Grand Slam singles finals in 2023, at the Australian Open and U.S. Open, and played one semester of college tennis at Southern California before turning pro that year.

MELBOURNE (Reuters) -Teenage qualifier Learner Tien became the youngest man to reach the Australian Open fourth round in 20 years as the future of American tennis lit up Melbourne Park on Saturday.

Qualifier and 19-year-old Learner Tien beat No. 5-ranked ... He made it to the junior finals of 2023 Australian Open and US Open and played a semester of college tennis at Southern California ...