Round: 26 Ground: Clay
| ITF Turkey F11 | 2015/03/21 08:00 | Sieber, Marc v Dimitar Kuzmanov | 2-6,6-4,6-0 |
| ITF Turkey F7 | 2015/02/22 09:00 | Sieber, Marc v Dimitar Kuzmanov | 5-7,3-6 |
| Turkey F15, Singles Qualifying | 2017/04/18 07:00 | Dimitar Kuzmanov v Mora, Daniel | 6-1,6-0 |
| Coupe Davis | 2017/04/08 08:00 | Dimitar Kuzmanov v Barry, Sam | 4-6,6-3,7-6 |
| Coupe Davis | 2017/04/07 11:30 | Dimitar Kuzmanov v Kapogiannis, Charalampos | 6-7,6-2,6-4 |
| Coupe Davis | 2017/04/06 09:00 | Dimitar Kuzmanov v Khachatryan, Mikayel | 6-3,7-6 |
| ITF Turkey F11 | 2017/03/24 10:35 | Dimitar Kuzmanov v Nedelko, Ivan | 1-6,1-6 |
| ITF Turkey F11 | 2017/03/23 07:00 | Dimitar Kuzmanov v Pedro Sakamoto | 6-4,7-5 |
| ITF Turkey F11 | 2017/03/21 08:45 | Altug Celikbilek v Dimitar Kuzmanov | 1-6,0-6 |
| Italie F3, Simples | 2017/03/07 15:35 | Di Nicola, Gianluca v Dimitar Kuzmanov | 6-7,7-6,6-4 |
| Turkey F15, Singles Qualifying | 2017/04/18 10:55 | Ladik, Oleg v Sieber, Marc | 2-6,0-6 |
| Turkey F14, Singles Qualifying | 2017/04/12 07:30 | Juan Pablo Varillas v Sieber, Marc | 2-6,7-5,6-3 |
| Challenger St Brieuc | 2017/03/28 08:30 | Sieber, Marc v Gleb Sakharov | 2-6,3-6 |
| ITF Egypt F9 | 2017/03/15 08:00 | Sieber, Marc v Smirnov, Artem | 3-6,3-6 |
| ITF Egypt F8 | 2017/03/08 08:00 | Sieber, Marc v Rudolf Molleker | 2-6,4-6 |
| ITF Turkey F7 | 2017/02/21 07:00 | Sieber, Marc v Cem Ilkel | 3-6,6-7 |
| Turkey F6, Singles Qualifying | 2017/02/19 08:30 | Benjamin Lock v Sieber, Marc | 3-6,6-7 |
| Turkey F6, Singles Qualifying | 2017/02/18 08:00 | Heyman, Christopher v Sieber, Marc | 3-6,1-6 |