There are three American men aged 23 and under in the second week of a Grand Slam. That hasn't happened since 2003

Learner Tien won again at the Australian Open today, knocking out France’s Corentin Moutet to progress to the fourth round of the men’s singles.

Two friends from California, Learner Tien and Alex Michelsen, have both reached the fourth round at the Australian Open. Tien is 19, and Michelsen is 20.

Vietnamese-American tennis player Learner Tien has advanced to the fourth round of the Australian Open 2025 after defeating Corentin Moutet in straight sets, continuing his extraordinary run in the tournament.

American teenager Learner Tien produced arguably the biggest shock of the Australian Open so far as he defeated last year’s runner-up Daniil Medvedev in five sets, 6-3, 7-6 (4), 6-7 (8), 1-6, 7-6 (7).

American qualifier Learner Tien, youngest man in 20 years to reach Australian Open fourth round, continues fairytale run.

Two of four American men still playing in Melbourne, Irvine native Tien, 19, and Aliso Viejo native Michelsen, 20, became friends on the youth tennis circuit