| Swedish Open (WTP) 2019, MS, Qualification | 11/01 19:00 | 5 | Jonghoon Lim v Jeong, Sangeun | L | 4-2 | |
| Qatar Open 2019, MS | 10/20 10:15 | 4 | Tomokazu Harimoto v Jeong, Sangeun | L | 4-0 | |
| Qatar Open 2019, MS | 10/19 10:30 | 1 | Jeong, Sangeun v Tsuboi, Gustavo | W | 4-0 | |
| Qatar Open 2019, MS | 10/19 08:00 | 1 | Jeong, Sangeun v Panagiotis Gionis | W | 4-1 | |
| Qatar Open 2019, MS | 07/21 03:30 | 3 | Jeong, Sangeun v Woojin Jang | L | 3-4 | |
| Qatar Open 2019, MS | 07/20 09:50 | 4 | Jeong, Sangeun v Oshima, Yuya | W | 4-0 | |
| Qatar Open 2019, MS | 07/19 09:40 | 5 | Koki Niwa v Jeong, Sangeun | W | 2-4 | |
| Qatar Open XD | 07/18 10:55 | - | Jeong, Sangeun v An Yan | W | 4-1 | |
| Qatar Open XD | 07/18 01:15 | 1 | Jeong, Sangeun v Qihao Zhou | W | 4-2 | |
| Qatar Open 2019, MS | 06/08 06:10 | 5 | Zhou, Yu v Jeong, Sangeun | L | 4-0 | |
| République tchèque - Extraleague | 06/01 06:40 | 5 | Jeong, Sangeun v Gaoyuan Lin | L | 0-4 | |
| Qatar Open XD | 05/30 10:00 | 1 | Kou, Lei v Jeong, Sangeun | W | 1-4 | |
| Qatar Open XD | 05/30 04:30 | 1 | Yang, Heng-Wei v Jeong, Sangeun | W | 2-4 | |
| République tchèque - Extraleague | 05/24 12:10 | 5 | Jeong, Sangeun v Jonghoon Lim | L | 1-4 | |
| German Open 2020, WD | 03/23 18:30 | 5 | Jeong, Sangeun v Chun Ting Wong | L | 2-4 | |
| Qatar Open XD | 03/22 15:30 | - | Jeong, Sangeun v Kirill Gerassimenko | W | 4-3 | |
| Qatar Open XD | 03/15 12:50 | 1 | Jeong, Sangeun v Yaroslav Zhmudenko | L | 2-4 | |
| Qatar Open XD | 03/06 13:00 | 1 | Jeong, Sangeun v Zhou, Yu | L | 1-4 | |
| Qatar Open XD | 02/24 18:20 | 1 | Ueda, Jin v Jeong, Sangeun | L | 3-2 | |
| Qatar Open XD | 02/24 17:20 | 1 | Tomokazu Harimoto v Jeong, Sangeun | L | 3-1 | |
| Qatar Open XD | 02/23 21:00 | - | Jeong, Sangeun v Quentin Robinot | W | 3-0 | |
| Qatar Open XD | 02/22 20:00 | 1 | Patrick Franziska v Jeong, Sangeun | W | 1-3 | |
| German Open 2020, WD | 11/11 10:40 | 4 | Kenta Matsudaira v Jeong, Sangeun | L | 4-1 | |
| German Open 2020, WD | 11/10 14:30 | 5 | Jeong, Sangeun v Koki Niwa | W | 4-2 | |
| Qatar Open XD | 11/09 15:00 | 1 | Jeong, Sangeun v Yu, Ziyang | W | 4-2 | |
| Qatar Open 2019, MS | 10/21 11:40 | 4 | Jeong, Sangeun v Simon Gauzy | L | 1-4 | |
| Qatar Open XD | 10/20 18:45 | 1 | Jeong, Sangeun v Tsuboi, Gustavo | W | 4-1 | |
| Qatar Open XD | 10/20 16:15 | 1 | Chien-An Chen v Jeong, Sangeun | - | Walkover | |
| Qatar Open XD | 06/14 09:20 | 1 | Jeong, Sangeun v Andrea Landrieu | L | 2-4 | |
| Qatar Open 2019, MS | 06/03 18:30 | 4 | Jeong, Sangeun v Chun Ting Wong | L | 1-4 |