Stadium: Opatija 1 Round: 60 Ground: Clay
| ITF Qatar F3 Qual | 2018/03/11 17:15 | Hong Kit Wong v Constantin Christ | 6-3,6-4 |
| ITF Qatar F3 Qual | 2018/03/10 08:00 | Hamad Nawaf v Constantin Christ | 2-6,1-6 |
| ITF Qatar F2 Qual | 2018/03/04 12:00 | Constantin Christ v Sean Hodkin | 2-6,1-6 |
| ITF Qatar F1 Qual | 2018/02/25 12:00 | George Botezan v Constantin Christ | 6-4,6-3 |
| ITF Qatar F1 Qual | 2018/02/24 08:00 | Mohamed Adnaoui v Constantin Christ | 1-6,6-4,3-6 |
| ITF Switzerland F1 Qual | 2018/02/04 11:30 | Constantin Christ v Jakob Aichhorn | 6-7,0-6 |
| ITF Switzerland F1 Qual | 2018/02/03 11:30 | Constantin Christ v Edoardo Graziani | 7-5,6-7,6-3 |
| ITF Germany F10 | 2017/08/06 08:00 | Jan Soeren Hain v Constantin Christ | 6-2,6-0 |
| ITF Croatia F3 | 2018/03/18 08:30 | Lukasz Kozielski v Dominik Kisantal | 2-6,7-5,2-6 |
| ITF Croatia F2 | 2018/03/10 08:00 | Dominik Kisantal v Deni Zmak | 1-6,2-6 |
| ITF Hungary F8 Qual | 2017/09/02 07:30 | Dominik Kisantal v Grega Teraz | 2-6,2-6 |
| ITF Hungary F7 Qual | 2017/08/26 12:00 | Ondrej Krstev v Dominik Kisantal | 6-2,7-6 |
| ITF Hungary F6 Qual | 2017/08/21 11:25 | Pavel Nejedly v Dominik Kisantal | 6-1,6-1 |
| ITF Hungary F6 Qual | 2017/08/20 09:00 | Dominik Kisantal v Oliver Varga-Toth | 7-6,6-3 |
| ITF Hungary F6 Qual | 2017/08/19 07:30 | Shramay Dhawan v Dominik Kisantal | 5-7,1-6 |
| ITF Hungary F8 | 2016/10/02 09:00 | Matthew Kandath v Dominik Kisantal | 6-2,7-5 |