Learner Tien is an American professional tennis player. He has a career-high ATP singles ranking of world No. 12 achieved on August 10, 2026 and doubles ranking of No. 298 achieved on May 25, 2026. Tien has won two ATP Tour singles titles, as well as the 2025 Next Gen ATP Finals, and his best result at the majors is reaching the quarterfinals of the 2026 Australian Open. He is currently the No. 4 American singles player.

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