Learner Tien
2023
| Us Open Junior | [11] | Final |
| Roland Garros Junior | Semi | |
| Australian Open Junior | Final | |
| J300Traralgon | Semi |
2022
| Us Open Junior | 1R | |
| Wimbledon Junior | Quarter |
Nation
USA
Age
19 years old (born in 2005)
World Ranking
ATP Ranking　67th
Year-end Junior World Ranking
- Year-end 2023 4th
- Year-end 2022 54th
- Year-end 2021 267th
- Year-end 2020 2202th
Match Details
2023 Us Open Junior
| W | 1R | Abel Forger | 6-2 6-4 |
| W | 2R | Sebastian Eriksson | 7-6 6-4 |
| W | 3R | Carlo Alberto Caniato | 6-4 6-3 |
| W | QF | Rodrigo Pacheco Mendez | 4-6 6-0 7-5 |
| W | SF | Arthur Gea | 7-6 6-7 6-1 |
| L | F | Joao Fonseca | 6-4 4-6 3-6 |
2023 Roland Garros Junior
| W | 1R | Federico Bondioli | 6-4 6-3 |
| W | 2R | Andrea Mchich | 7-6 6-3 |
| W | 3R | Alexander Blockx | 6-4 |
| W | QF | Joao Fonseca | 6-3 2-6 6-1 |
| L | SF | Juan Carlos Prado Angelo | 1-6 5-7 |
2023 Australian Open Junior
| W | 1R | Hayato Matsuoka | 6-0 6-3 |
| W | 2R | Federico Cina | 2-6 6-2 6-4 |
| W | 3R | Jakub Filip | 6-0 6-2 |
| W | QF | Iliyan Radulov | 6-0 6-0 |
| W | SF | Tomasz Berkieta | 6-4 6-2 |
| L | F | Alexander Blockx | 1-6 6-2 6-7 |
2023 J300Traralgon
| W | 1R | Danil Panarin | 6-4 6-0 |
| W | 2R | Zoran Ludoski | 6-1 6-3 |
| W | 3R | Maxim Mrva | 6-2 6-4 |
| W | QF | Atakan Karahan | 6-1 6-3 |
| L | SF | Kyle Kang | 3-6 3-6 |
2022 Us Open Junior
| L | 1R | Lautaro Midon | 3-6 2-6 |
2022 Wimbledon Junior
| W | 1R | Jack Loutit | 6-4 6-0 |
| W | 2R | Gonzalo Bueno | 4-6 6-3 6-3 |
| W | 3R | Martyn Pawelski | 6-3 6-7 6-2 |
| L | QF | Martin Landaluce | 5-7 3-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 9482, Number of registered players: 4,990, Number of registered results: 217,154