stadio: Court 1 Round: 25 Ground: Hardcourt indoor
| ITF Germania F11 | 2018/08/07 09:00 | Constantin Schmitz v Stefan Seifert | 7-5,2-6,6-2 |
| ITF Irlanda F1 | 2018/08/04 12:45 | Stefan Seifert v Ryan James Storrie | 3-6,7-6,3-6 |
| ITF Irlanda F1 | 2018/08/03 13:15 | George Botezan v Stefan Seifert | 5-7,0-6 |
| ITF Irlanda F1 | 2018/08/02 13:05 | Daniil Zarichanskiy v Stefan Seifert | 2-6,1-6 |
| ITF Irlanda F1 | 2018/07/31 14:20 | Michael Shaw v Stefan Seifert | 7-6,4-6,3-6 |
| Challenger Braunschweig - Qual. | 2018/07/07 15:00 | Stefan Seifert v Jan Satral | 6-7,2-6 |
| Challenger Braunschweig - Qual. | 2018/07/07 09:55 | Stefan Seifert v Alejo Vilaro | 6-1,3-6,6-3 |
| ITF Israele F11 | 2018/06/29 07:00 | Jordan Hasson v Stefan Seifert | 6-4,6-3 |
| ITF Germania F15 | 2018/10/08 08:00 | Piotr Galus v Tim Hofmann | 7-5,6-1 |
| ITF Germania F15 | 2018/10/07 09:00 | Dominik Langmajer v Piotr Galus | 5-7,7-5,2-6 |
| ITF Germania F15 | 2018/10/07 08:00 | Piotr Galus v Paulo Knippling | 6-1,6-1 |
| Challenger Szczecin | 2018/09/08 13:25 | Ivan Gakhov v Piotr Galus | 6-1,6-3 |
| ITF Polonia F8 | 2018/08/20 08:00 | Petr Nouza v Piotr Galus | 6-0,6-0 |
| ITF Polonia F8 | 2018/08/18 08:00 | Michal Bedra v Piotr Galus | 1-6,6-4,2-6 |
| ITF Polonia F7 | 2018/08/11 08:00 | Viktor Kostin v Piotr Galus | 6-3,7-5 |
| ITF Polonia F6 | 2018/08/07 10:35 | Piotr Galus v Jan Zielinski | 3-6,5-7 |