Stadium: Court 2 Round: 25 Ground: Carpet indoor
| ITF Czech Republic F2 | 2017/05/28 08:30 | Jan Mertl v Julian Lenz | 6-4,2-6,2-6 |
| ITF Switzerland F1 | 2018/02/06 14:45 | Jan Mertl v Alexander Ritschard | 6-2,6-7,6-7 |
| ITF Germany F2 | 2018/01/25 10:00 | Jan Mertl v Pedro Cachin | 6-4,4-6,5-7 |
| ITF Germany F2 | 2018/01/24 14:50 | Jan Mertl v Kevin Krawietz | 4-6,7-6,6-1 |
| Czechia Extraliga | 2017/12/17 11:40 | Jan Mertl v Tobias Kamke | 7-6,2-6,6-7 |
| Czechia Extraliga | 2017/12/16 13:41 | Peter Gojowczyk v Jan Mertl | 6-3,6-6 |
| Czechia Extraliga | 2017/12/16 10:20 | Peter Gojowczyk v Jan Mertl | 6-3,7-6 |
| Challenger Bratislava Qual | 2017/11/06 11:20 | Tom Farquharson v Jan Mertl | 7-6,6-3 |
| Challenger Bratislava Qual | 2017/11/05 12:40 | Samuel Puskar v Jan Mertl | 4-6,3-6 |
| ITF Switzerland F1 | 2018/02/09 13:00 | Julian Lenz v Tobias Simon | 6-7,4-6 |
| 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 |