| Challenger Gimcheon - Qual. | 2018/05/05 06:00 | Young Seok Kim v Dong Ju Kim | 6-1,6-3 |
| Challenger Seoul - Qual. | 2018/04/28 01:30 | Sanhui Shin v Dong Ju Kim | 6-4,6-4 |
| ITF Corea del Sud F5 | 2017/06/28 04:40 | Dong Ju Kim v Hyun-Woo Nam | 0-6,4-6 |
| ITF Corea del Sud F5 | 2017/06/27 01:30 | Sungbeen Sim v Dong Ju Kim | 3-6,6-3,2-6 |
| Challenger Gimcheon - Qual. | 2018/05/05 02:50 | Tae-Woo Lee v Makoto Ochi | 4-6,1-6 |
| Challenger Seoul - Qual. | 2018/04/28 03:05 | Jung-Woong Na v Tae-Woo Lee | 6-1,6-3 |
| ITF Giappone F4 | 2018/03/24 00:00 | Tae-Woo Lee v Tamaki Yamao | 1-6,4-6 |
| ITF Giappone F3 | 2018/03/19 02:40 | Tae-Woo Lee v Kaito Uesugi | 3-6,3-6 |
| ITF Giappone F2 | 2018/03/12 02:30 | Tung-Lin Wu v Tae-Woo Lee | 6-1,6-1 |
| ITF Turchia F6 | 2018/02/15 09:10 | Jordi Samper-Montana v Tae-Woo Lee | 6-1,6-0 |
| ITF Turchia F6 | 2018/02/14 12:20 | Thomas Statzberger v Tae-Woo Lee | 2-6,6-3,4-6 |
| ITF Turchia F5 | 2018/02/07 08:30 | Tae-Woo Lee v Jordi Samper-Montana | 1-6,1-6 |