Estadio: Clay 5 Round: 26 Ground: Hardcourt outdoor
| ITF Turquía F32 | 2018/10/16 07:00 | Gabriel Donev v Razvan M Codescu | 6-1,6-2 |
| ITF Turquía F32 | 2018/10/15 07:00 | Gabriel Donev v Plamen Milushev | 6-4,6-3 |
| ITF Turquía F32 | 2018/10/14 07:00 | Gabriel Donev v Vincentiu A Niculescu | 2-6,6-1,6-3 |
| ITF Serbia F3 | 2018/08/24 08:00 | Yanais Laurent v Gabriel Donev | 6-4,3-6,7-5 |
| ITF Serbia F3 | 2018/08/23 09:35 | James Frawley v Gabriel Donev | 4-6,1-6 |
| ITF Serbia F3 | 2018/08/22 08:00 | Gabriel Donev v Darko Jandric | 6-7,6-1,6-3 |
| ITF Serbia F2 | 2018/08/15 08:00 | Gabriel Donev v Duje Ajdukovic | 6-3,4-6,2-6 |
| ITF Bélgica F5 | 2018/07/24 14:00 | Colin Sinclair v Gabriel Donev | 6-3,6-4 |
| ITF Turquía F32 | 2018/10/16 07:00 | Tomas Liska v Nik Razborsek | 4-6,2-6 |
| Challenger de Florencia | 2018/09/30 09:30 | Nik Razborsek v Roberto Marcora | 4-6,2-6 |
| Challenger de Florencia | 2018/09/29 11:10 | Nik Razborsek v Gianluca Di Nicola | 6-0,6-3 |
| Challenger de Biella | 2018/09/16 12:00 | Mathias Bourgue v Nik Razborsek | 6-3,6-1 |
| Challenger de Biella | 2018/09/15 10:00 | Andrea Vavassori v Nik Razborsek | 6-7,1-6 |
| ITF Países Bajos F6 | 2018/09/02 13:00 | Nik Razborsek v Tom Kocevar-Desman | 7-6,6-4 |
| ITF Países Bajos F6 | 2018/09/01 11:15 | Mathieu Perchicot v Nik Razborsek | 4-6,3-6 |
| ITF Países Bajos F6 | 2018/08/31 13:15 | Nik Razborsek v Justin Butsch | 6-3,6-3 |