Stadion: Center Court Round: 45
| 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 |
| ITF - Deutschland F8 | 2018/07/19 09:30 | Marc Sieber v Christopher Heyman | 1-6,5-7 |
| ITF - Deutschland F8 | 2018/07/17 14:05 | Viktor Durasovic v Marc Sieber | 3-6,2-6 |
| ITF - Deutschland F8 | 2018/07/21 14:35 | Orlando Luz v Julian Lenz | 6-3,6-3 |
| ITF - Deutschland F8 | 2018/07/20 15:10 | Bruno Santanna v Julian Lenz | 6-2,1-6,2-6 |
| ITF - Deutschland F8 | 2018/07/19 15:40 | Julian Lenz v Jordi Samper-Montana | 6-1,6-2 |
| ITF - Deutschland F8 | 2018/07/17 15:45 | Pedro Sakamoto v Julian Lenz | 5-7,1-6 |
| Challenger - Marburg | 2018/07/06 14:00 | Hugo Dellien v Julian Lenz | 6-3,6-3 |
| Challenger - Marburg | 2018/07/05 13:10 | Elliot Benchetrit v Julian Lenz | 4-6,5-7 |
| Challenger - Marburg | 2018/07/04 16:45 | Julian Lenz v Rudolf Molleker | 3-6,6-3,7-6 |
| Challenger - Marburg | 2018/07/02 14:00 | Sebastian Ofner v Julian Lenz | 1-6,6-7 |