Stadium: Center Court Round: 46
| Challenger Jinan | 2018/08/04 08:20 | Shintaro Imai v Tung-Lin Wu | 2-6,3-6 |
| Challenger Granby Qual | 2018/07/22 21:30 | Jacob Grills v Shintaro Imai | 6-4,6-1 |
| Challenger Granby Qual | 2018/07/21 15:55 | Liam Draxl v Shintaro Imai | 4-6,2-6 |
| Challenger Gatineau Qual | 2018/07/14 18:05 | Shintaro Imai v Antoine Escoffier | 4-6,6-3,1-6 |
| ITF Hong Kong F2 | 2018/07/07 02:00 | Maverick Banes v Shintaro Imai | 7-5,6-2 |
| ITF Hong Kong F2 | 2018/07/06 02:00 | Shintaro Imai v Ryota Tanuma | 6-2,6-2 |
| ITF Hong Kong F2 | 2018/07/05 02:00 | Issei Okamura v Shintaro Imai | 2-6,1-6 |
| ITF Hong Kong F2 | 2018/07/04 02:00 | Hei Yin Andrew Li v Shintaro Imai | 2-6,0-6 |
| 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 |
| Challenger Seoul Qual | 2018/04/29 02:00 | Jung-Woong Na v Makoto Ochi | 2-6,4-6 |
| Challenger Seoul Qual | 2018/04/28 03:05 | Jung-Woong Na v Tae-Woo Lee | 6-1,6-3 |
| ITF Turkey F5 | 2018/02/08 07:30 | Jung-Woong Na v Nino Serdarusic | 1-6,2-6 |
| ITF Turkey F5 | 2018/02/06 07:30 | Razvan M Codescu v Jung-Woong Na | 3-6,0-6 |