Stadion: B & B Court Round: 46 Ground: Clay
| Challenger - Meerbusch - Qualifikation | 2018/08/11 11:45 | Mats Rosenkranz v Marc Sieber | 3-6,3-6 |
| Challenger - Pullach - Qualifikation | 2018/08/04 09:00 | Marc Sieber v Julian Lenz | 4-6,6-4,4-6 |
| Challenger - Liberec - Qualifikation | 2018/07/29 08:30 | Marc Sieber v Marvin Moeller | 2-6,5-7 |
| Challenger - Liberec - Qualifikation | 2018/07/28 08:00 | Juan Pablo Ficovich v Marc Sieber | 3-6,6-3,3-6 |
| Challenger - Prag | 2018/07/24 11:30 | Aleksandr Nedovyesov v Marc Sieber | 6-0,6-4 |
| Challenger - Prag - Qualifikation | 2018/07/23 10:10 | Peter Torebko v Marc Sieber | 1-6,4-6 |
| Challenger - Prag - Qualifikation | 2018/07/22 14:10 | Dominik Kellovsky v Marc Sieber | 3-6,6-7 |
| Challenger - Prag | 2018/07/21 14:05 | Mathieu Perchicot v Marc Sieber | 6-1,2-6,3-6 |
| Challenger - Meerbusch - Qualifikation | 2018/08/11 12:30 | Adrian Oetzbach v Pol Toledo Bague | 6-4,4-6,6-2 |
| ITF - Deutschland F11 | 2018/08/08 16:00 | Mats Rosenkranz v Adrian Oetzbach | 6-4,7-5 |
| ITF - Deutschland F11 | 2018/08/07 11:20 | Adrian Oetzbach v Daniel Kopeinigg | 7-5,1-6,6-4 |
| ITF - Deutschland F10 | 2018/08/01 15:00 | James Frawley v Adrian Oetzbach | 6-2,7-6 |
| ITF - Deutschland F9 | 2018/07/22 11:00 | Adrian Oetzbach v Sandro Ehrat | 4-6,3-6 |
| ITF - Deutschland F9 | 2018/07/22 08:00 | Adrian Oetzbach v Gilles Eckert | 6-3,6-4 |
| ITF - Belgien F4 | 2018/07/16 08:00 | Adrian Oetzbach v Franco Emanuel Egea | 6-7,2-6 |
| ITF - Deutschland F6 | 2018/07/01 13:00 | Adrian Oetzbach v Aziz Kijametovic | 2-6,3-6 |