Stadium: Court 6 Round: 62 Ground: Clay
| ITF Netherlands F4 | 2018/08/11 09:00 | Alban Meuffels v Niklas Guttau | 6-3,6-4 |
| ITF Poland F6 | 2018/08/07 11:25 | Adrian Andrzejczuk v Niklas Guttau | 6-2,6-1 |
| ITF Poland F6 Qual | 2018/08/06 08:00 | Niklas Guttau v Krzysztof Mlazga | 6-2,6-4 |
| ITF Poland F6 Qual | 2018/08/05 09:30 | Niklas Guttau v Michele Lorenzo Iftimie | 5-7,6-2,6-3 |
| 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 |
| ITF Netherlands F5 | 2018/08/18 07:00 | Floris Van Den Brink v Esteban Bruna | 3-6,2-6 |
| ITF Finland F3 | 2018/08/12 10:25 | Esteban Bruna v Sam Taylor | 7-6,5-7,5-7 |
| ITF Finland F3 | 2018/08/11 07:00 | Esteban Bruna v Sami Huurinainen | 7-6,6-2 |
| ITF Finland F2 | 2018/08/06 12:00 | Christoffer Solberg v Esteban Bruna | 7-5,5-7,6-1 |
| ITF Finland F2 Qual | 2018/08/05 11:50 | Eero Vasa v Esteban Bruna | 6-2,6-2 |
| ITF Latvia F1 | 2018/07/29 07:00 | Esteban Bruna v Igor Karpovets | 2-6,6-4,1-6 |
| ITF Latvia F1 | 2018/07/28 07:00 | Esteban Bruna v Gustavs Lukstins | 6-4,6-1 |
| ITF Lithuania F1 | 2018/07/21 07:00 | Esteban Bruna v Jan Galka | 6-3,3-6,3-6 |