Stadium: Court 3 Round: 45 Ground: Grass
| ITF Australia F8 | 2018/10/09 00:00 | Moerani Bouzige v Issei Okamura | 7-5,6-1 |
| ITF Australia F7 | 2018/10/04 03:55 | Benjamin Mitchell v Issei Okamura | 6-4,1-6,6-1 |
| ITF Australia F7 | 2018/10/02 00:00 | Issei Okamura v Vincent Stouff | 6-4,6-4 |
| ITF Australia F6 | 2018/09/25 00:30 | Connor Farren v Issei Okamura | 3-6,7-6,6-2 |
| ITF Australia F5 | 2018/09/21 01:00 | Brydan Klein v Issei Okamura | 6-3,6-2 |
| ITF Australia F5 | 2018/09/20 03:55 | Aaron Addison v Issei Okamura | 2-6,7-6,2-6 |
| ITF Australia F5 | 2018/09/18 00:00 | Scott Puodziunas v Issei Okamura | 6-7,7-5,4-6 |
| Challenger Gwangju Qual | 2018/08/11 01:30 | Issei Okamura v Jung-Woong Na | 3-6,6-1,1-6 |
| 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 |