Yunseok Jang
World Ranking
ATP Ranking　1471th
Year-end Junior World Ranking
Rival
Malanqi Du (3-2)
- [2020] China JuniOr 2 6-4 6-1
- [2020] China JuniOr 1 2-6 2-6
- [2020] J4SHENZHEN-2 6-4 6-1
- [2020] J4SHENZHEN 2-6 2-6
- [2019] China JuniOr 3 7-5 6-4
Iiro Vasa (0-2)
- [2020] China JuniOr 2 0-6 2-6
- [2020] J4SHENZHEN-2 0-6 2-6
Chun Lam (2-0)
- [2020] China JuniOr 2 7-6 6-1
- [2020] J4SHENZHEN-2 7-6 6-1
Gunuk Kang (2-0)
- [2020] China JuniOr 2 6-1 7-5
- [2020] J4SHENZHEN-2 6-1 7-5
Jing Ke Chen (2-0)
- [2020] China JuniOr 1 6-2 6-1
- [2020] J4SHENZHEN 6-2 6-1
Match Details
| W | 1R | Boburmirzo Ekubjanov | 6-0 6-0 |
| L | 2R | Sebastian Sec | 3-6 1-4 |
| W | 1R | Xing Dao Chen | 7-5 6-4 |
| W | 2R | Jing Ke Chen | 6-2 6-1 |
| L | 3R | Malanqi Du | 2-6 2-6 |
| W | 1R | Jun Ha Hyun | 6-1 6-1 |
| W | 2R | Khomtat Kitthachok | 6-1 6-1 |
| W | QF | Woohyuk Sim | 6-1 6-2 |
| W | 1R | Jie Ding | 6-1 6-0 |
| W | 2R | Egor Tsarapkin | 6-3 4-1 |
| W | 3R | Malanqi Du | 6-4 6-1 |
| W | QF | Gunuk Kang | 6-1 7-5 |
| W | SF | Chun Lam | 7-6 6-1 |
| L | F | Iiro Vasa | 0-6 2-6 |
| W | 1R | Jie Ding | 6-1 6-0 |
| W | 2R | Egor Tsarapkin | 6-3 4-1 |
| W | 3R | Malanqi Du | 6-4 6-1 |
| W | QF | Gunuk Kang | 6-1 7-5 |
| W | SF | Chun Lam | 7-6 6-1 |
| L | F | Iiro Vasa | 0-6 2-6 |
| W | 1R | Xing Dao Chen | 7-5 6-4 |
| W | 2R | Jing Ke Chen | 6-2 6-1 |
| L | 3R | Malanqi Du | 2-6 2-6 |
| W | 1R | Malanqi Du | 7-5 6-4 |
| L | 2R | Zhan Zheng | 4-6 0-6 |
| W | 1R | Yi Wei Zhang | 7-5 6-1 |
| W | 2R | Jianhao Sheng | 6-0 6-1 |
| W | 3R | Haoyuan Huang | 6-4 6-1 |
| W | QF | Qian Sun | 7-6 7-6 |
| L | SF | Patorn Hanchaikul | 6-3 1-6 3-6 |
Junior Tennis Database is a site that summarizes the results of ITF junior tennis tournaments.
Number of registered tournaments: 9670, Number of registered players: 6,052, Number of registered results: 333,569