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