Reigning French Open and Wimbledon champion Alcaraz certainly knows what it takes to make an impact from a young age ...

U.S. 19-year old Learner Tien defeated No. 5 Daniil Medvedev in a fifth set tiebreaker in the Australian Open, making history in Melboune.

Daniil Medvedev, beaten in the Melbourne final last year by Sinner, faces Learner Tien, 19, of the United States in a later ...

A series of jaw-dropping upsets of top 10 players at the Australian Open by fearless teenagers has fuelled excitement at the future of men's tennis as the old guard fades into history.

The Irvine native and 19-year-old qualifier, who played one semester at USC, wins a 4-hour, 49-minute thriller that ends at ...

American qualifier Learner Tien shocked the tennis world on Thursday when he upset last year's Australian Open runner-up Daniil Medvedev in a nearly five-hour, five-set match in the second round.

American teenager Learner Tien produced arguably the biggest shock of the Australian Open so far as he defeated last year’s ...

The 19-year-old who was a late qualifier to the Grand Slam secured the biggest win of his young career on Thursday ...

The 19-year-old from Irvine, California nearly lost a two-set lead from match point up but held off a late surge from a former world No. 1 to win the biggest match of his career.

Learner Tien has become the youngest American man to reach the Australian Open's third round since Pete Sampras in 1990.