Stadium: Hard Court 5 Round: 44 Ground: Hardcourt outdoor
| ITF Turkey F1 | 2018/01/07 07:30 | Sieber, Marc v Ono, Masayoshi | 6-2,6-2 |
| Challenger Bratislava Qual | 2017/11/05 09:00 | Kalenichenko, Danylo v Sieber, Marc | 7-6,6-3 |
| Challenger Bratislava Qual | 2017/11/04 09:00 | Altug Celikbilek v Sieber, Marc | 7-5,1-6,0-6 |
| Challenger Eckental Qual | 2017/10/30 11:20 | Kern, Robin v Sieber, Marc | 6-4,6-2 |
| Challenger Eckental Qual | 2017/10/29 16:10 | Cacic, Nikola v Sieber, Marc | 2-6,6-3,1-6 |
| Challenger Eckental Qual | 2017/10/28 17:10 | Kapas, Andriej v Sieber, Marc | 6-4,4-6,3-6 |
| Brest, France, Qualifying | 2017/10/22 14:45 | Arnaboldi, Andrea v Sieber, Marc | 1-6,6-3,6-3 |
| Brest, France, Qualifying | 2017/10/21 10:55 | Vega Hernandez, David v Sieber, Marc | 2-6,4-6 |
| ITF Turkey F1 | 2018/01/07 07:30 | Valentsev, Nikita v Bojanovic, Darko | 5-7,2-6 |
| Turquie F48, Simples | 2017/12/19 08:00 | van Beem, Colin v Bojanovic, Darko | 6-2,6-2 |
| ITF Turkey F47 | 2017/12/14 10:00 | Bojanovic, Darko v Rodriguez, Cristian | 4-6,4-6 |
| ITF Turkey F47 | 2017/12/12 10:20 | Bothwell, Peter v Bojanovic, Darko | 4-6,3-6 |
| ITF Turkey F47 Qual | 2017/12/11 08:30 | Bojanovic, Darko v Vladusic, Nenad | 6-3,4-6,6-1 |
| ITF Turkey F47 Qual | 2017/12/10 07:15 | Bojanovic, Darko v Petrov, Pavel | 6-1,6-2 |
| ITF Turkey F45 | 2017/11/29 11:50 | Bojanovic, Darko v Erler, Alexander | 1-6,3-6 |
| ITF Turkey F45 Qual | 2017/11/28 10:30 | Bojanovic, Darko v Palazov, Zlatan | 6-2,2-6,6-4 |