Round: 25 Ground: Clay
| ITF Turkey F7 | 2015/02/14 11:00 | Johannes Haerteis v Nik Razborsek | 5-7,4-6 |
| ITF Austria F3 | 2016/07/23 08:00 | Sebastian Ofner v Nik Razborsek | 6-2,6-3 |
| ITF Austria F3 | 2016/07/22 08:00 | Nik Razborsek v Fabrizio Ornago | 6-4,6-2 |
| ITF Austria F3 | 2016/07/21 10:05 | Christoph Negritu v Nik Razborsek | 3-6,4-6 |
| ITF Austria F3 | 2016/07/19 08:00 | Ondrej Krstev v Nik Razborsek | 6-3,1-6,5-7 |
| ITF Austria F2 | 2016/07/14 13:00 | Nik Razborsek v Stefanos Tsitsipas | 6-3,4-6,2-6 |
| ITF Austria F2 | 2016/07/13 09:55 | Bradley Mousley v Nik Razborsek | 4-6,1-6 |
| ITF Austria F2 | 2016/07/11 10:30 | Filippo Leonardi v Nik Razborsek | 0-6,4-6 |
| ITF Germany F6 | 2016/07/08 16:45 | Johann Willems v Nik Razborsek | 6-3,7-6 |
| ITF Germany F8 | 2016/07/20 13:15 | Johannes Haerteis v Artem Smirnov | 1-6,3-6 |
| ITF Germany F7 | 2016/07/12 10:30 | Federico Coria v Johannes Haerteis | 6-3,6-7,6-4 |
| ITF Germany F5 | 2016/07/01 11:00 | Marc Sieber v Johannes Haerteis | 6-3,7-5 |
| ITF Germany F5 | 2016/06/30 10:00 | Artem Dubrivnyy v Johannes Haerteis | 2-6,1-6 |
| ATP Halle Qual | 2016/06/11 09:00 | Johannes Haerteis v Robin Haase | 4-6,2-6 |
| ITF Czech Republic F2 | 2016/05/21 10:30 | Clement Geens v Johannes Haerteis | 6-3,7-5 |
| ITF Czech Republic F2 | 2016/05/20 10:40 | Petr Michnev v Johannes Haerteis | 6-7,6-4,4-6 |
| ITF Czech Republic F2 | 2016/05/19 09:00 | Johannes Haerteis v Tom Kocevar-Desman | 4-6,6-1,6-1 |