Stadium: Hard Court 5 Round: 26 Ground: Hardcourt outdoor
| 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 |
| ITF Turkey F1 | 2018/01/08 07:30 | Sieber, Marc v Bojanovic, Darko | 6-1,6-0 |
| ITF Turkey F1 | 2018/01/07 07:30 | Sieber, Marc v Ono, Masayoshi | 6-2,6-2 |
| ITF Turkey F2 | 2018/01/17 09:15 | Takeda, Naoki v Nik Razborsek | 5-7,2-6 |
| ITF Turkey F2 | 2018/01/16 10:30 | Nik Razborsek v Ergi Kirkin | 7-6,0-6,6-2 |
| ITF Turkey F2 | 2018/01/15 07:00 | Nik Razborsek v Cengiz Aksu | 6-2,6-0 |
| ITF Turkey F2 | 2018/01/15 07:00 | Nik Razborsek v Ouvrard, Victor | 6-3,6-7,6-0 |
| ITF Slovakia F2 | 2017/08/04 08:00 | Nema, Patrik v Nik Razborsek | 6-3,6-4 |
| ITF Slovakia F2 | 2017/08/03 08:00 | Butler, Samm v Nik Razborsek | 2-6,1-6 |
| ITF Slovakia F2 | 2017/08/02 14:40 | Juras, David v Nik Razborsek | 1-6,0-6 |
| ITF Slovakia F1 | 2017/07/28 11:55 | Kalenichenko, Danylo v Nik Razborsek | 7-6,6-2 |