Stadium: Court 2 Round: 25 Ground: Clay
| ITF Belgium F4 | 2018/07/18 12:55 | Jeremy Sonkin v Colin Sinclair | 7-6,7-5 |
| ITF Belgium F4 | 2018/07/17 13:10 | Colin Sinclair v Zizou Bergs | 0-6,7-5,6-3 |
| ITF Netherlands F3 | 2018/07/07 09:30 | Colin Sinclair v Ilco Van Buuren | 6-2,6-2 |
| ITF Netherlands F3 | 2018/07/07 08:00 | Colin Sinclair v Alban Meuffels | 2-6,4-6 |
| Puchar Davisa | 2018/04/04 11:50 | Colin Sinclair v Christian Didier Chin | 3-6,2-6 |
| ITF Thailand F12 | 2017/12/12 10:00 | Colin Sinclair v Daniel Altmaier | 3-6,5-7 |
| ITF Thailand F12 Qual | 2017/12/11 04:15 | Sung Jun Park v Colin Sinclair | 3-6,4-6 |
| ITF Thailand F12 Qual | 2017/12/10 03:00 | Colin Sinclair v Min Hyeok Cho | 4-6,6-4,6-4 |
| ITF Germany F5 | 2018/06/28 11:00 | Gabriel Donev v Filip Bergevi | 2-6,4-6 |
| ITF Germany F5 | 2018/06/27 11:35 | Alexander Igoshin v Gabriel Donev | 2-6,2-6 |
| ITF Germany F5 | 2018/06/25 08:00 | Gabriel Donev v August Holmgren | 6-2,7-6 |
| ITF Germany F5 | 2018/06/25 08:00 | Gabriel Donev v Karlo Cubelic | 6-2,6-2 |
| 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 |