Round: 25 Ground: Hardcourt outdoor
| ITF Turkey F3 | 2017/01/27 08:00 | Cem Ilkel v Sieber, Marc | 7-6,6-4 |
| Turkey F15, Singles Qualifying | 2016/04/17 09:00 | Sieber, Marc v Cem Ilkel | 2-6,6-4,6-4 |
| ITF Turkey F13 | 2016/04/02 10:30 | Cem Ilkel v Sieber, Marc | 1-6,6-3,6-2 |
| 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 |
| Turkey F6, Singles Qualifying | 2017/02/17 07:30 | Mantilla, Felipe v Sieber, Marc | 1-6,6-7 |
| Turkey F6, Singles Qualifying | 2017/02/16 09:25 | Halebian, Alexios v Sieber, Marc | 1-6,0-6 |
| Turkey F6, Singles Qualifying | 2017/02/14 09:05 | Deviatiarov, Marat v Sieber, Marc | 2-6,1-6 |
| Challenger Budapest | 2017/02/08 09:30 | Joris De Loore v Sieber, Marc | 6-3,7-6 |
| ITF Turkey F3 | 2017/01/27 08:00 | Cem Ilkel v Sieber, Marc | 7-6,6-4 |
| ITF Turkey F3 | 2017/01/26 07:30 | Matej Vocel v Sieber, Marc | 4-6,0-6 |
| ITF Turkey F7 | 2017/02/20 07:00 | Cem Ilkel v Domagoj Biljesko | 6-4,6-7,7-5 |
| ITF Turkey F7 | 2017/02/19 06:30 | Cem Ilkel v Korolev, Vladimir | 6-2,6-2 |
| ITF Turkey F7 | 2017/02/18 06:00 | Cem Ilkel v Born, Yannick Stephan | 6-2,6-3 |
| Sofia, Bulgaria | 2017/02/08 11:50 | Cem Ilkel v Troicki, Viktor | 3-6,2-6 |
| Coupe Davis | 2017/02/03 09:00 | Petros Chrysochos v Cem Ilkel | 7-6,6-3,3-6,0-6,4-6 |
| ITF Turkey F3 | 2017/01/28 08:00 | Konecny, Michal v Cem Ilkel | 4-6,6-3,6-7 |
| ITF Turkey F3 | 2017/01/27 08:00 | Cem Ilkel v Sieber, Marc | 7-6,6-4 |
| ITF Turkey F3 | 2017/01/26 09:55 | Cem Ilkel v Zaitcev, Anton | 6-1,6-0 |