Stadium: Court 1 Round: 62 Ground: Clay
| ITF Romania F1 | 2018/05/22 09:20 | Gabriel Donev v Mathieu Perchicot | 3-6,1-6 |
| ITF Bulgaria F1 | 2018/05/18 09:10 | Calin Manda v Gabriel Donev | 6-1,2-6,6-2 |
| ITF Bulgaria F1 | 2018/05/17 07:00 | Gabriel Donev v Stefan Seifert | 6-4,6-1 |
| ITF Bulgaria F1 | 2018/05/16 08:35 | Gabriel Donev v Andrej Glvac | 5-7,6-3,6-0 |
| ITF Turkey F11 | 2018/03/23 08:00 | Gabriel Donev v Peter Heller | 1-6,6-1,3-6 |
| ITF Turkey F11 | 2018/03/22 07:30 | Aleksandr Nedovyesov v Gabriel Donev | 5-7,2-6 |
| ITF Turkey F11 | 2018/03/20 09:30 | Gabriel Donev v Juan Bautista Otegui | 4-6,6-3,7-5 |
| ITF Turkey F11 | 2018/03/19 07:00 | Gabriel Donev v Felipe Garla | 6-4,6-4 |
| ITF Germany F5 | 2018/06/24 15:00 | Karlo Cubelic v Jordi Walder | 7-5,3-6,6-2 |
| ITF Germany F4 | 2018/06/18 11:00 | Roy Sarut De Valk v Karlo Cubelic | 6-1,6-1 |
| ITF Germany F4 | 2018/06/17 12:00 | Karlo Cubelic v Jonathan Morr | 7-5,6-4 |
| ITF Germany F4 | 2018/06/16 08:00 | Pelle Boerma v Karlo Cubelic | 1-6,2-6 |
| ITF Tunisia F16 | 2018/04/22 12:00 | Karlo Cubelic v Hugo Pierre | 2-6,5-7 |
| ITF Tunisia F15 | 2018/04/15 11:30 | Sean Hodkin v Karlo Cubelic | 6-4,6-3 |
| ITF Tunisia F15 | 2018/04/14 11:30 | Severin Steiner v Karlo Cubelic | 1-6,1-6 |
| ITF Tunisia F14 | 2018/04/08 11:30 | Clement Tabur v Karlo Cubelic | 6-2,6-3 |