Round: 25 Ground: Clay
| ITF Germany F7 | 2017/07/10 10:30 | Mark Burgos v Lucas Koelle | 4-6,6-2,3-6 |
| ITF Germany F7 | 2017/07/09 08:00 | Felipe Garla v Lucas Koelle | 2-6,5-7 |
| ITF Germany F6 | 2017/07/05 14:10 | Lucas Koelle v Christoph Negritu | 2-6,3-6 |
| ITF Germany F6 | 2017/07/03 12:00 | Christophe Tholl v Lucas Koelle | 4-6,6-3,5-7 |
| ITF Germany F6 | 2017/07/02 13:00 | Pavle Daljev v Lucas Koelle | 7-5,5-7,3-6 |
| ITF Turkey F49 | 2016/12/07 09:10 | Lucas Koelle v Andriej Kapas | 4-6,2-6 |
| ITF Turkey F48 | 2016/12/02 07:00 | Lucas Koelle v Lorenzo Frigerio | 5-7,2-6 |
| ITF Turkey F48 | 2016/11/30 09:55 | Lucas Koelle v Isa Mammetgulyyev | 6-1,6-1 |
| ITF Germany F6 | 2017/07/05 11:15 | Dominik Boehler v Marc Giner | 6-7,2-6 |
| ITF Italy F19 | 2017/06/29 11:30 | Dominik Boehler v Lenny Hampel | 1-6,6-7 |
| ITF Italy F19 | 2017/06/28 09:45 | Andrea Pellegrino v Dominik Boehler | 0-6,5-7 |
| ITF Italy F19 | 2017/06/27 09:00 | Dominik Boehler v Pietro Rondoni | 6-2,6-3 |
| ITF Germany F4 | 2017/06/23 11:35 | Alexander Vasilenko v Dominik Boehler | 6-4,6-3 |
| ITF Germany F4 | 2017/06/22 15:25 | Dominik Boehler v Julian Onken | 6-3,6-1 |
| ITF Germany F4 | 2017/06/20 09:00 | Fernando Yamacita v Dominik Boehler | 6-3,2-6,3-6 |
| Challenger Heilbronn Qual | 2017/05/13 12:30 | Dominik Boehler v John-Patrick Smith | 5-7,5-7 |