Ground: Hardcourt outdoor
| ITF Turkey F7 | 2015/02/22 09:00 | Sieber, Marc v Dimitar Kuzmanov | 5-7,3-6 |
| ITF Turkey F11 | 2015/03/20 09:50 | Weissborn, Tristan v Sieber, Marc | 2-6,3-6 |
| ITF Turkey F11 | 2015/03/19 07:30 | Di Nicola, Gianluca v Sieber, Marc | 6-7,6-7 |
| ITF Turkey F11 | 2015/03/17 09:00 | Sieber, Marc v Kamil Majchrzak | 6-4,6-2 |
| ITF Turkey F7 | 2015/02/22 09:00 | Sieber, Marc v Dimitar Kuzmanov | 5-7,3-6 |
| ITF Turkey F7 | 2015/02/20 09:00 | Stanek, Robin v Sieber, Marc | 6-4,4-6,1-6 |
| ITF Turkey F7 | 2015/02/19 11:10 | Evgeny Karlovskiy v Sieber, Marc | 2-6,6-3,4-6 |
| ITF Turkey F7 | 2015/02/18 10:40 | Sieber, Marc v Vorster, Tucker | 6-4,4-6,7-5 |
| ITF Turkey F7 | 2015/02/17 07:30 | Sieber, Marc v Patael, Ben | 6-1,6-3 |
| ITF Turkey F11 | 2015/03/20 08:00 | Zhizhen Zhang v Dimitar Kuzmanov | 1-6,4-6 |
| ITF Turkey F11 | 2015/03/19 07:30 | Alcaraz Ivorra, Albert v Dimitar Kuzmanov | 4-6,2-6 |
| ITF Turkey F11 | 2015/03/18 07:30 | Khassanov, Roman v Dimitar Kuzmanov | 2-6,0-6 |
| Coupe Davis | 2015/03/08 12:00 | Podzus, Martins v Dimitar Kuzmanov | 6-7,7-5,2-6,4-6 |
| Coupe Davis | 2015/03/06 15:50 | Podzus, Janis v Dimitar Kuzmanov | 4-6,6-3,3-6,6-1,10-12 |
| ITF Turkey F7 | 2015/02/22 09:00 | Sieber, Marc v Dimitar Kuzmanov | 5-7,3-6 |
| ITF Turkey F7 | 2015/02/21 09:00 | Dimitar Kuzmanov v Dima, Dragos | 6-1,6-4 |
| ITF Turkey F7 | 2015/02/20 09:00 | Stebe, Cedrik-Marcel v Dimitar Kuzmanov | 3-6,2-6 |