Stadium: Court 3 Round: 62 Ground: Clay
| Challenger Istanbul | 2021/09/14 07:50 | Marc Polmans v Koray Kirci | 6-3,6-2 |
| ITF M15 Chornomorsk | 2021/08/31 07:00 | Koray Kirci v Ilya Snitari | 1-6,5-7 |
| ITF M15 Novi Sad | 2021/08/03 08:00 | Koray Kirci v Lukas Palovic | 6-3,4-6,7-10 |
| ITF M15 Novi Sad | 2021/08/02 11:00 | Koray Kirci v Aleksandr Kalinin | 6-4,6-2 |
| ITF M15 Novi Sad | 2021/08/01 07:00 | Koray Kirci v Matic Dimic | 7-6,6-4 |
| ITF M15 Novi Sad | 2021/07/27 07:30 | Matic Spec v Koray Kirci | 6-3,7-5 |
| ITF M15 Novi Sad | 2021/07/26 10:30 | Aleksandar Tomas v Koray Kirci | 4-6,2-6 |
| ITF M15 Novi Sad | 2021/07/25 15:00 | Luka Vukovic v Koray Kirci | 3-6,4-6 |
| ITF M15 Antalya | 2021/06/13 07:30 | Pawel Juszczak v Doruk Turknas | 6-2,6-2 |
| ITF M15 Antalya | 2021/05/16 07:00 | Doruk Turknas v Yaraslav Shyla | 1-6,1-6 |
| ITF M15 Antalya | 2021/03/14 07:00 | Doruk Turknas v Vladislav Gorbatenko | 1-6,1-6 |
| ITF M15 Antalya | 2021/02/28 11:00 | Caspar Schuetze v Doruk Turknas | 6-3,6-4 |
| ITF M15 Antalya | 2021/01/31 10:00 | Max Houkes v Doruk Turknas | 6-0,6-1 |