Round: 44 Ground: Hardcourt outdoor
| ITF Korea F1 Qual | 2017/05/28 01:00 | Kim, Hyun-Joon v Sungbeen Sim | 4-6,2-6 |
| ITF Korea F1 Qual | 2017/05/28 03:30 | Sin, Dong-Hak v Kim, Dukyoung | 3-6,6-3,6-1 |
| ITF Korea F1 Qual | 2017/05/27 02:00 | Sin, Dong-Hak v 조, 형진 | 6-3,6-4 |
| ITF Korea F8 | 2016/09/04 03:00 | Sasai, Masaki v Sin, Dong-Hak | 6-2,6-1 |
| ITF Korea F8 | 2016/09/03 01:00 | 최, 재원 v Sin, Dong-Hak | 4-6,5-7 |
| ITF Korea F1 Qual | 2016/06/13 05:00 | Sin, Dong-Hak v Choi, Jong Min | 3-6,3-6 |
| ITF Korea F1 Qual | 2016/06/12 03:00 | Sin, Dong-Hak v 유, 성운 | 6-3,6-2 |
| ITF Korea F1 Qual | 2016/06/11 01:00 | Shin, Geon Ju v Sin, Dong-Hak | 7-6,4-6,4-6 |
| ITF USA F5 | 2016/01/22 16:30 | Sin, Dong-Hak v 베니테즈 차바리아가, 주안 마누엘 | 5-7,0-6 |