Stadium: Clay 3 Round: 62 Ground: Clay
| ITF Slovakia F1 | 2018/07/21 08:00 | Jan Jermar v Shunsuke Wakita | 1-6,4-6 |
| ITF Austria F3 | 2018/07/14 12:30 | Shunsuke Wakita v Thibault Cancel | 3-6,4-6 |
| ITF Austria F3 | 2018/07/14 07:15 | Shunsuke Wakita v David Martirosian | 6-1,7-5 |
| ITF Sri Lanka F3 | 2018/06/25 07:00 | Shunsuke Wakita v Jirat Navasirisomboon | 4-6,6-7 |
| ITF Sri Lanka F2 | 2018/06/19 08:55 | Shunsuke Wakita v Alexander Zhurbin | 4-6,2-6 |
| ITF Sri Lanka F1 | 2018/06/12 05:45 | Shunsuke Wakita v Alexander Zhurbin | 3-6,3-6 |
| ITF Uganda F4 | 2018/05/21 11:25 | Shunsuke Wakita v Marco Miceli | 1-6,3-6 |
| ITF Uganda F3 | 2018/05/15 09:50 | Goran Markovic v Shunsuke Wakita | 6-4,4-6,6-4 |
| ATP Hamburg Qual | 2018/07/21 12:45 | Jozef Kovalik v Niklas Guttau | 6-0,6-1 |
| ITF Germany F8 Qual | 2018/07/16 10:30 | Tim Seibert v Niklas Guttau | 6-7,7-6,6-2 |
| ITF Germany F8 Qual | 2018/07/15 12:30 | Marcel Marlon Sudzum v Niklas Guttau | 4-6,0-6 |
| ITF Germany F8 Qual | 2018/07/15 08:30 | Marlon Vankan v Niklas Guttau | 1-6,2-6 |
| Challenger Braunschweig Qual | 2018/07/07 09:30 | Kimmer Coppejans v Niklas Guttau | 6-3,6-1 |
| ITF Germany F4 | 2018/06/19 10:45 | Wilfredo Gonzalez v Niklas Guttau | 6-3,7-6 |
| ITF Turkey F15 | 2018/04/14 07:30 | Niklas Guttau v Louroi Martinez | 1-6,6-2,0-6 |
| ITF Turkey F14 | 2018/04/07 11:00 | Niklas Guttau v Lucas Hellfritsch | 4-6,3-6 |