Stadium: Hard Court 3 Round: 29 Ground: Hardcourt outdoor
| 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 |
| 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 |
| ITF Turkey F1 | 2018/01/14 12:00 | Altug Celikbilek v Quinzi, Gianluigi | 3-6,2-6 |
| ITF Turkey F1 | 2018/01/13 12:00 | Frunza, Nicolae v Quinzi, Gianluigi | 3-6,3-6 |
| ITF Turkey F1 | 2018/01/12 11:30 | Matteo Martineau v Quinzi, Gianluigi | 4-6,5-7 |
| ITF Turkey F1 | 2018/01/10 08:00 | Milan Drinic v Quinzi, Gianluigi | 2-6,2-6 |
| ATP Next Gen Finals | 2017/11/09 13:00 | Chung, Hyeon v Quinzi, Gianluigi | 1-4,4-1,4-2,3-4,4-3 |
| ATP Next Gen Finals | 2017/11/08 18:30 | Denis Shapovalov v Quinzi, Gianluigi | 4-1,4-1,3-4,4-3 |
| ATP Next Gen Finals | 2017/11/07 20:50 | Andrey Rublev v Quinzi, Gianluigi | 1-4,4-0,4-3,0-4,4-3 |
| ATP Next Gen Finals 8th spot | 2017/11/05 16:52 | Baldi, Filippo v Quinzi, Gianluigi | 4-3,4-3,2-4,2-4,2-4 |