Stadium: Hard Court 3 Round: 28 Ground: Hardcourt outdoor
| ITF Turkey F24 | 2017/06/25 08:00 | Sieber, Marc v Dimitar Kuzmanov | 3-6,6-2,1-6 |
| Turkey F15, Singles Qualifying | 2017/04/20 07:00 | Dimitar Kuzmanov v Sieber, Marc | 4-6,6-4,6-2 |
| 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 |
| ITF Turkey F2 | 2018/01/19 07:30 | Dimitar Kuzmanov v Milan Drinic | 7-5,6-1 |
| ITF Turkey F2 | 2018/01/18 07:30 | Dimitar Kuzmanov v Frunza, Nicolae | 7-6,6-1 |
| ITF Turkey F2 | 2018/01/16 10:30 | Dimitar Kuzmanov v Nikolay Vylegzhanin | 6-2,6-3 |
| Challenger Santiago 2 | 2017/11/14 14:00 | Dimitar Kuzmanov v Berlocq, Carlos | 3-6,0-6 |
| Challenger Santiago 2 Qual | 2017/11/12 14:00 | Dimitar Kuzmanov v Alejandro Tabilo | 7-6,7-5 |
| Challenger Santiago 2 Qual | 2017/11/11 18:00 | Dimitar Kuzmanov v Neis, Fabricio | 7-6,7-5 |
| Challenger Montevideo Qual | 2017/11/06 19:35 | Dimitar Kuzmanov v Hernandez-Fernandez, Jose | 6-7,5-7 |
| Challenger Montevideo Qual | 2017/11/05 17:45 | Dimitar Kuzmanov v Dario Acosta | 6-0,6-0 |
| ITF Turkey F2 | 2018/01/19 08:40 | Sieber, Marc v Quinzi, Gianluigi | 7-5,6-4 |
| ITF Turkey F2 | 2018/01/18 10:05 | Sieber, Marc v Nik Razborsek | 6-3,6-3 |
| ITF Turkey F2 | 2018/01/17 09:45 | Sieber, Marc v Glasspool, Lloyd | 6-2,6-0 |
| ITF Turkey F1 | 2018/01/15 08:00 | Sieber, Marc v Quinzi, Gianluigi | 6-3,3-6,3-6 |
| ITF Turkey F1 | 2018/01/14 13:00 | Ryan James Storrie v Sieber, Marc | 3-6,3-6 |
| ITF Turkey F1 | 2018/01/13 12:00 | Sieber, Marc v Gray, Jonathan | 6-2,6-4 |
| ITF Turkey F1 | 2018/01/12 12:55 | Sieber, Marc v Eon, Julien | 6-1,6-0 |
| ITF Turkey F1 | 2018/01/09 09:15 | Sieber, Marc v Alekseenko, Vadim | 6-2,6-0 |