Stadium: Court 3 Round: 45 Ground: Grass
| ITF M15 Anning | 2019/01/10 04:30 | Issei Okamura v Naoki Tajima | 6-4,3-6,4-6 |
| ITF M15 Anning | 2019/01/08 02:30 | Ti Chen v Issei Okamura | 2-6,5-7 |
| ITF M15 Anning | 2019/01/01 04:40 | Tao Mu v Issei Okamura | 3-6,6-2,7-5 |
| ITF Hong Kong F3 | 2018/12/26 03:00 | Riccardo Bonadio v Issei Okamura | 6-3,7-5 |
| ITF Hong Kong F3 | 2018/12/25 09:35 | Issei Okamura v Yuki Mochizuki | 7-6,7-6 |
| ITF Hong Kong F3 | 2018/12/24 02:00 | Issei Okamura v Taisei Ichikawa | 6-2,7-5 |
| ITF Hong Kong F3 | 2018/12/22 02:00 | Issei Okamura v Kyle Lok Yin Tang | 6-1,6-1 |
| Challenger Kobe | 2018/11/11 03:35 | Jacob Grills v Issei Okamura | 1-6,6-4,6-3 |
| ITF Germany F9 | 2018/07/22 11:00 | Mislav Bosnjak v Patrik Hartmeier | 6-7,1-6 |
| ITF Germany F8 Qual | 2018/07/15 12:00 | Mislav Bosnjak v Leon Hoeveler | 3-6,6-1,2-6 |
| ITF Spain F15 | 2018/06/13 18:15 | Mislav Bosnjak v Fernando Bogajo | 7-6,3-6,5-7 |
| ITF Spain F15 Qual | 2018/06/11 09:30 | Mislav Bosnjak v Maximilian Gatev | 6-7,7-6,6-1 |
| ITF Spain F15 Qual | 2018/06/09 07:00 | Mislav Bosnjak v Manuel Luis Lamelas | 6-4,7-6 |
| ITF Tunisia F21 | 2018/05/27 09:00 | Vasil Kirkov v Mislav Bosnjak | 5-7,6-4,6-1 |
| ITF Tunisia F21 | 2018/05/26 09:00 | Mislav Bosnjak v Brandon Murphy | 6-3,6-2 |
| ITF Tunisia F20 | 2018/05/19 09:00 | Davide Albertoni v Mislav Bosnjak | 3-6,6-3,6-3 |