Round: 25 Ground: Clay
| 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 Turkey F47 | 2016/11/22 08:30 | Alexander Lazov v Lucas Koelle | 6-7,6-2,6-2 |
| Challenger Bogota | 2016/11/08 20:00 | Lucas Koelle v Fernando Romboli | 6-3,5-7,3-6 |
| ITF Brazil F5 | 2015/08/24 18:40 | Lucas Koelle v Thales Turini | 1-6,3-6 |
| ITF Romania F5 | 2017/06/30 08:30 | Christoph Negritu v Peter Nagy | 6-7,3-6 |
| ITF Romania F5 | 2017/06/29 08:00 | Christoph Negritu v Michiel de Krom | 6-3,6-2 |
| ITF Romania F5 | 2017/06/28 09:00 | Christoph Negritu v Aaron Addison | 6-1,6-4 |
| ITF Turkey F21 | 2017/06/02 07:30 | Christoph Negritu v Ivan Nedelko | 3-6,4-6 |
| ITF Turkey F21 | 2017/06/01 07:30 | Maxime Chazal v Christoph Negritu | 5-7,5-7 |
| ITF Turkey F21 | 2017/05/31 09:35 | Jonas Trinker v Christoph Negritu | 5-7,2-6 |
| ITF Turkey F15 | 2017/04/19 07:00 | Christoph Negritu v Juan Carlos Saez | 3-6,4-6 |
| ITF Turkey F14 | 2017/04/13 09:30 | Altug Celikbilek v Christoph Negritu | 6-3,6-7,6-2 |