Stadium: Court 13 Round: 27
| Challenger Seoul Qual | 2018/04/29 02:00 | Jung-Woong Na v Makoto Ochi | 2-6,4-6 |
| ITF Korea F5 | 2018/08/22 02:00 | Mark Whitehouse v Jung-Woong Na | 6-4,3-6,3-6 |
| ITF Korea F5 | 2018/08/21 02:00 | Ku Keon Kang v Jung-Woong Na | 6-4,6-7,0-6 |
| Challenger Gwangju Qual | 2018/08/13 01:00 | Jung-Woong Na v Yecong He | 6-3,5-7,5-7 |
| Challenger Gwangju Qual | 2018/08/12 01:30 | Shintaro Imai v Jung-Woong Na | 4-6,2-6 |
| Challenger Gwangju Qual | 2018/08/11 01:30 | Issei Okamura v Jung-Woong Na | 3-6,6-1,1-6 |
| ITF Korea F1 | 2018/06/06 01:00 | Jung-Woong Na v Ji Hoon Son | 6-4,6-7,6-4 |
| Challenger Busan | 2018/05/15 05:50 | Max Purcell v Jung-Woong Na | 6-4,6-1 |
| Challenger Gimcheon Qual | 2018/05/05 05:20 | Jacob Grills v Jung-Woong Na | 5-7,6-4,6-3 |
| ITF Korea F5 | 2018/08/22 02:00 | Aaron Addison v Makoto Ochi | 1-6,3-6 |
| ITF Korea F5 | 2018/08/21 02:45 | Mitchell Thomas McDaniels v Makoto Ochi | 4-6,1-6 |
| Challenger Gwangju | 2018/08/18 03:55 | Maverick Banes v Makoto Ochi | 6-4,6-4 |
| Challenger Gwangju | 2018/08/17 02:00 | Duckhee Lee v Makoto Ochi | 2-6,1-6 |
| Challenger Gwangju | 2018/08/15 07:50 | Makoto Ochi v Blake Ellis | 7-5,6-1 |
| Challenger Gwangju | 2018/08/13 08:40 | Lucas Catarina v Makoto Ochi | 3-6,2-6 |
| Challenger Jinan | 2018/08/04 07:30 | Makoto Ochi v Tak Khunn Wang | 0-6,0-6 |
| Challenger Chengdu | 2018/07/31 03:00 | Makoto Ochi v Alexander Bublik | 2-6,5-7 |