Stadium: Center Court Round: 25 Ground: Hardcourt outdoor
| Challenger Chengdu | 2018/08/02 08:05 | Duckhee Lee v James Ward | 6-4,5-7,3-6 |
| Challenger Chengdu | 2018/07/31 06:05 | Nikola Milojevic v Duckhee Lee | 4-6,4-6 |
| Challenger Astana | 2018/07/19 07:50 | Duckhee Lee v Pavel Kotov | 7-5,6-7,5-7 |
| Challenger Astana | 2018/07/17 11:10 | Duckhee Lee v Sagadat Ayap | 6-4,6-2 |
| Wimbledon Qual | 2018/06/25 16:35 | Attila Balazs v Duckhee Lee | 6-3,5-7,6-1 |
| ATP Antalya Qual | 2018/06/23 11:00 | Filip Horansky v Duckhee Lee | 7-5,6-2 |
| Challenger Fergana | 2018/06/20 08:15 | Aldin Setkic v Duckhee Lee | 6-2,6-3 |
| Challenger Fergana | 2018/06/18 09:05 | Yusuke Takahashi v Duckhee Lee | 6-7,1-6 |
| ITF Korea F3 | 2018/06/19 06:35 | Hong Chung v Shintaro Imai | 6-7,6-3,1-6 |
| ITF Korea F2 | 2018/06/13 06:45 | Hong Chung v Chan-Yeong Oh | 2-6,2-6 |
| ITF Korea F1 | 2018/06/08 03:30 | Takuto Niki v Hong Chung | 6-1,6-0 |
| ITF Korea F1 | 2018/06/07 01:00 | Jae-Won Choi v Hong Chung | 6-2,4-6,5-7 |
| ITF Korea F1 | 2018/06/05 01:00 | Alec Adamson v Hong Chung | 5-7,6-2,2-6 |
| Challenger Busan Qual | 2018/05/12 04:15 | Hong Chung v Maverick Banes | 3-6,4-6 |
| ITF Thailand F12 | 2017/12/12 03:00 | Hong Chung v Pascal Meis | 2-6,6-7 |
| ITF Thailand F11 | 2017/12/05 03:30 | Hong Chung v Yan Bai | 2-6,3-6 |