Learner Tien
| Tien at the 2024 US Open | |
| Country (sports) | United States | 
|---|---|
| Residence | Irvine, California, US | 
| Born | December 2, 2005 Irvine, California, US | 
| Height | 1.80 m (5 ft 11 in) | 
| Turned pro | 2023 | 
| Plays | Left-handed (two-handed backhand) | 
| College | University of Southern California | 
| Coach | Eric Diaz | 
| Prize money | US $ 1,356,375 | 
| Singles | |
| Career record | 13–19 (at ATP Tour level, Grand Slam level, and in Davis Cup) | 
| Career titles | 0 | 
| Highest ranking | No. 66 (March 17, 2025) | 
| Current ranking | No. 67 (16 June 2025) | 
| Grand Slam singles results | |
| Australian Open | 4R (2025) | 
| French Open | 1R (2025) | 
| US Open | 1R (2022, 2023, 2024) | 
| Doubles | |
| Career record | 2–6 (at ATP Tour level, Grand Slam level, and in Davis Cup) | 
| Career titles | 0 | 
| Highest ranking | No. 431 (16 June 2025) | 
| Current ranking | No. 431 (16 June 2025) | 
| Grand Slam doubles results | |
| French Open | 2R (2025) | 
| Grand Slam mixed doubles results | |
| US Open | 1R (2024) | 
| Last updated on: 16 June 2025. | |
Learner Tien (born December 2, 2005) is an American professional tennis player. He has a career-high ATP singles ranking of world No. 66, achieved on March 17, 2025 and a doubles ranking of No. 722, achieved on February 3, 2025.