At just 19, Learner Tien, a Vietnamese-American from Irvine, California, has navigated his first full ATP Tour season with the poise of a far more experienced competitor. Breaking into the Top 40, the American lefty has built on his 2024 ATP Next Gen Finals run with a 2025 season that has been at times inconsistent, but consistently remarkable for a player of his age and background.

Five Top 10 Wins in 2025

Tien’s 2025 season has been defined by his ability to step up against the best. He’s faced Top 10 opposition seven times this year, amassing a phenomenal 5-2 record. Only Jannik Sinner and Carlos Alcaraz have notched more top-10 wins this season. The year began with Tien’s breakthrough five-set victory over Daniil Medvedev in a dramatic Australian Open clash that ended deep into the M

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