Stadium: Court 1 Round: 25 Ground: Clay
| ITF Austria F4 | 2018/07/23 09:00 | Adrian Andrzejczuk v Frederik Press | 2-6,3-6 |
| ITF Austria F3 | 2018/07/14 12:30 | Adrian Andrzejczuk v Martin Fekiac | 3-6,6-3,3-6 |
| ITF Austria F3 | 2018/07/14 07:15 | Adrian Andrzejczuk v Adam Torocsik | 6-2,6-3 |
| ITF Czech Republic F6 | 2018/07/11 08:00 | Tadeas Paroulek v Adrian Andrzejczuk | 4-6,6-0,7-6 |
| ITF Czech Republic F6 | 2018/07/10 10:50 | Adrian Andrzejczuk v Richard Muzaev | 6-4,7-6 |
| ITF Czech Republic F6 Qual | 2018/07/08 10:30 | Adrian Andrzejczuk v Matej Cintl | 6-3,6-0 |
| ITF Czech Republic F6 Qual | 2018/07/07 09:30 | Adrian Andrzejczuk v Dusan Rajic | 6-4,6-3 |
| ITF Vietnam F3 | 2018/05/14 05:05 | Adrian Andrzejczuk v Alexios Halebian | 3-6,7-6,5-7 |
| 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 |
| 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 |