Stadium: Center Court Round: 28 Ground: Carpet indoor
| ITF France F6 | 2014/03/12 10:00 | Doumbia, Sadio v Kern, Robin | 6-2,6-3 |
| ITF Germany F2 | 2018/01/26 18:30 | Kern, Robin v Boehler, Dominik | 7-5,6-4 |
| ITF Germany F2 | 2018/01/25 14:45 | Juan Pablo Ficovich v Kern, Robin | 4-6,7-6,6-7 |
| ITF Germany F2 | 2018/01/24 11:30 | Benjamin Hassan v Kern, Robin | 6-7,4-6 |
| ITF Germany F1 | 2018/01/11 15:00 | Kern, Robin v Simon, Tobias | 6-3,6-7,6-7 |
| Challenger Andria | 2017/11/21 19:00 | Andrea Pellegrino v Kern, Robin | 6-4,6-4 |
| ITF Finland F4 | 2017/11/16 13:00 | Mohamed Safwat v Kern, Robin | 7-5,4-6,6-4 |
| ITF Finland F4 | 2017/11/15 09:30 | Ivanov, Vladimir v Kern, Robin | 6-3,1-6,3-6 |
| ITF Finland F4 | 2017/11/14 13:20 | Alexey Aleshchev v Kern, Robin | 1-6,1-6 |
| ITF Germany F2 | 2018/01/26 10:30 | Doumbia, Sadio v Pedro Cachin | 4-6,6-3,6-1 |
| ITF Germany F2 | 2018/01/25 14:15 | Adrian Bodmer v Doumbia, Sadio | 5-7,3-6 |
| ITF Germany F2 | 2018/01/24 16:20 | Christoph Negritu v Doumbia, Sadio | 6-7,1-6 |
| ITF France F2 | 2018/01/19 11:00 | Albano Olivetti v Doumbia, Sadio | 7-5,6-4 |
| ITF France F2 | 2018/01/18 11:15 | Bayard, Damien v Doumbia, Sadio | 1-6,1-6 |
| ITF France F2 | 2018/01/16 12:25 | Robert, Quentin v Doumbia, Sadio | 3-6,3-6 |
| Shenzhen II, Chine | 2017/10/31 03:15 | Doumbia, Sadio v Akira Santillan | 6-7,2-6 |
| Suzhou, China | 2017/10/26 02:30 | Hubert Hurkacz v Doumbia, Sadio | 7-6,6-1 |