Stadium: Center Court Round: 25 Ground: Hardcourt outdoor
| Challenger Istanbul | 2018/09/10 11:00 | Ergi Kirkin v Cem Ilkel | 2-6,6-4,4-6 |
| ITF Turkey F46 | 2017/12/06 07:15 | Ergi Kirkin v Cem Ilkel | 1-6,1-6 |
| Challenger Bratislava | 2021/11/07 14:35 | Ergi Kirkin v Milos Karol | 1-6,6-7 |
| Challenger Tenerife | 2021/11/01 16:00 | Tallon Griekspoor v Ergi Kirkin | 6-2,6-2 |
| Challenger Losinj | 2021/10/19 08:00 | Raul Brancaccio v Ergi Kirkin | 6-3,3-6,6-2 |
| Challenger Napoli | 2021/10/06 08:00 | Stefano Travaglia v Ergi Kirkin | 7-6,6-3 |
| Challenger Sibiu | 2021/09/30 11:00 | Thanasi Kokkinakis v Ergi Kirkin | 6-1,6-1 |
| Challenger Sibiu | 2021/09/27 12:45 | Ergi Kirkin v Alexey Vatutin | 7-5,4-6,6-1 |
| Challenger Kyiv | 2021/09/11 11:15 | Sebastian Baez v Ergi Kirkin | 6-3,6-2 |
| Challenger Kyiv | 2021/09/09 10:00 | Ergi Kirkin v Sergiy Stakhovsky | 4-6,6-3,6-2 |
| Challenger Bratislava | 2021/11/11 11:40 | Stefano Travaglia v Cem Ilkel | 6-4,6-2 |
| Challenger Bratislava | 2021/11/10 09:30 | Cem Ilkel v Alexander Shevchenko | 6-4,6-7,6-3 |
| Challenger Bergamo | 2021/11/07 15:30 | Holger Rune v Cem Ilkel | 7-5,7-6 |
| Challenger Bergamo | 2021/11/06 20:00 | Cem Ilkel v Fabian Marozsan | 7-6,5-7,6-4 |
| Challenger Bergamo | 2021/11/05 14:00 | Liam Broady v Cem Ilkel | 5-7,6-3,1-6 |
| Challenger Bergamo | 2021/11/04 11:50 | Cem Ilkel v Radu Albot | 7-5,6-3 |
| Challenger Bergamo | 2021/11/02 10:30 | Pavel Kotov v Cem Ilkel | 6-4,1-6,6-7 |
| Challenger Ismaning | 2021/10/26 11:20 | Cem Ilkel v Julian Lenz | 7-6,5-7,1-6 |