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

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.

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.

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.

Teenage qualifier Learner Tien on Saturday became the youngest man to reach the Australian Open 2025 fourth round since Rafael Nadal in 2005 when he overcame injured Frenchman Corentin Moutet. The American 19-year-old won 7-6 (12/10),

Tien caused an upset at the Australian Open on Thursday, dumping out No. 5 seed Daniil Medvedev in a five-set thriller.

American qualifier Learner Tien became the youngest man to reach the Australian Open fourth round in 20 years as he beat an ailing Corentin Moutet 7-6(10) 6-3 6-3 on Saturday, continuing the teenager's fairytale run at Melbourne Park.

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