Round: 25 Ground: Carpet indoor
| ITF Germany F3 | 2017/01/23 11:30 | Haerteis, Johannes v Rudolf Molleker | 6-4,6-3 |
| ITF Germany F3 | 2017/01/23 08:30 | Haerteis, Johannes v Lang, Robin | 7-5,6-3 |
| ITF Germany F2 | 2017/01/18 15:45 | Rudolf Molleker v Haerteis, Johannes | 4-6,6-4,6-4 |
| ITF Germany F1 | 2017/01/11 18:15 | Haerteis, Johannes v Rosenholm, Patrik | 4-6,5-7 |
| ITF Germany F1 | 2017/01/11 08:00 | Haerteis, Johannes v Rosenholm, Patrik | 4-6,5-7 |
| ITF Germany F12 | 2016/08/25 09:45 | Werner, Jean-Marc v Haerteis, Johannes | 6-3,6-3 |
| ITF Germany F12 | 2016/08/24 12:30 | Haerteis, Johannes v Kern, Robin | 6-3,6-4 |
| ITF Germany F11 | 2016/08/19 12:10 | Beck, Andreas v Haerteis, Johannes | 6-1,6-1 |
| Challenger Andria | 2016/11/24 10:00 | Grigelis, Laurynas v Stefanos Tsitsipas | 6-7,6-4,3-6 |
| Challenger Andria | 2016/11/23 11:40 | Grigelis, Laurynas v Torebko, Peter | 6-4,6-4 |
| Brescia, Italy | 2016/11/20 16:00 | Vanni, Luca v Grigelis, Laurynas | 6-7,6-4,7-6 |
| Brescia, Italy | 2016/11/19 14:00 | Salvatore Caruso v Grigelis, Laurynas | 4-6,4-6 |
| Brescia, Italy | 2016/11/17 21:05 | Mayer, Leonardo v Grigelis, Laurynas | 6-3,6-7,5-7 |
| Brescia, Italy | 2016/11/16 11:50 | Grigelis, Laurynas v Arnaboldi, Andrea | 3-6,6-3,7-6 |
| Challenger Brescia Qual | 2016/11/14 11:30 | Egor Gerasimov v Grigelis, Laurynas | 6-1,6-2 |
| Challenger Brescia Qual | 2016/11/13 12:10 | Kapas, Andriej v Grigelis, Laurynas | 6-7,6-7 |