Stadium: C2 Round: 27 Ground: Carpet indoor
| ITF Switzerland F1 | 2018/02/08 12:00 | Albano Olivetti v Julian Lenz | 7-5,5-7,6-7 |
| ITF Switzerland F1 | 2018/02/06 12:00 | Johannes Haerteis v Julian Lenz | 6-2,1-6,4-6 |
| ITF Germany F2 | 2018/01/23 11:30 | Julian Lenz v Botic Van De Zandschulp | 6-7,3-6 |
| Challenger Koblenz Qual | 2018/01/14 12:25 | Pedro Cachin v Julian Lenz | 6-1,6-3 |
| ITF Turkey F47 | 2017/12/15 07:15 | Tak Khunn Wang v Julian Lenz | 6-4,6-3 |
| ITF Turkey F47 | 2017/12/14 08:50 | Kaya Gore v Julian Lenz | 2-6,1-6 |
| ITF Turkey F47 | 2017/12/12 07:15 | Adam Chadaj v Julian Lenz | 6-3,3-6,6-7 |
| ITF USA F39 | 2017/11/30 17:00 | Danny Thomas v Julian Lenz | 7-6,1-6,6-4 |
| ITF Switzerland F1 | 2018/02/08 15:20 | Tobias Simon v Ugo Humbert | 6-7,6-1,7-6 |
| ITF Switzerland F1 | 2018/02/07 16:20 | Elmar Ejupovic v Tobias Simon | 4-6,6-7 |
| ITF Germany F3 | 2018/02/01 11:00 | Tobias Simon v Botic Van De Zandschulp | 4-6,7-5,6-7 |
| ITF Germany F3 | 2018/01/30 13:50 | Tobias Simon v Marvin Greven | 7-6,6-4 |
| ITF Germany F2 | 2018/01/25 10:00 | Tobias Simon v Daniel Masur | 5-7,3-6 |
| ITF Germany F2 | 2018/01/23 10:00 | Tobias Simon v Paul Woerner | 7-6,1-6,7-6 |
| ITF Germany F1 | 2018/01/13 12:00 | Kevin Krawietz v Tobias Simon | 6-2,3-6,7-6 |
| ITF Germany F1 | 2018/01/11 15:00 | Robin Kern v Tobias Simon | 6-3,6-7,6-7 |