Stadium: Hard Court 6 Round: 26 Ground: Hardcourt outdoor
| Turkey F8, Singles Qualifying | 2018/02/28 08:30 | Sieber, Marc v Davydov, Ivan | 6-3,6-3 |
| Challenger Bergamo Qual | 2018/02/18 10:50 | Sieber, Marc v Jankovits, Yannick | 2-6,6-3,3-6 |
| Challenger Bergamo Qual | 2018/02/17 12:00 | Daniel Masur v Sieber, Marc | 3-6,3-6 |
| Challenger Budapest Qual | 2018/02/04 11:30 | Sieber, Marc v Bega, Alessandro | 7-6,0-6,5-7 |
| Challenger Budapest Qual | 2018/02/03 08:30 | Karimov, Jurabek v Sieber, Marc | 1-6,3-6 |
| ITF Turkey F3 | 2018/01/26 09:30 | Dimitar Kuzmanov v Sieber, Marc | 2-6,7-5,7-5 |
| ITF Turkey F3 | 2018/01/25 10:00 | Kiyamov, Timur v Sieber, Marc | 6-4,1-6,3-6 |
| ITF Turkey F3 | 2018/01/23 09:55 | Mubarak Shannan Zayid v Sieber, Marc | 6-7,1-6 |
| Turkey F8, Singles Qualifying | 2018/02/28 08:30 | Miladinovic, Marko v Juan Bautista Otegui | 5-7,6-3,6-2 |
| Turkey F8, Singles Qualifying | 2018/02/26 06:00 | Madaras, Dragos Nicolae v Miladinovic, Marko | 2-6,3-6 |
| Turkey F8, Singles Qualifying | 2018/02/25 07:30 | Bradley, Julian v Miladinovic, Marko | 2-6,2-6 |
| Turkey F8, Singles Qualifying | 2018/02/24 09:30 | Miladinovic, Marko v Mertens, Nico | 6-2,6-0 |
| ITF Turkey F7 | 2018/02/21 12:35 | Miladinovic, Marko v Dimitar Kuzmanov | 5-7,6-4,3-6 |
| ITF Turkey F7 | 2018/02/19 08:00 | Urbanija, Mike v Miladinovic, Marko | 2-6,2-6 |
| ITF Turkey F7 | 2018/02/18 06:30 | Miladinovic, Marko v Kim, Cheong Hwi | 6-1,6-4 |
| ITF Egypt F29 | 2017/10/12 14:00 | Antoine Escoffier v Miladinovic, Marko | 6-4,2-6,6-2 |