Stadium: Court 3 Round: 27 Ground: Hardcourt outdoor
| Challenger Yokohama | 2018/02/28 01:30 | Duckhee Lee v Cem Ilkel | 2-6,6-2,6-7 |
| Challenger Yokohama | 2018/02/27 01:00 | Blake Ellis v Cem Ilkel | 3-6,4-6 |
| Challenger Kyoto | 2018/02/20 03:45 | Cem Ilkel v Tim Puetz | 3-6,2-6 |
| Challenger Chennai | 2018/02/14 05:30 | Yasutaka Uchiyama v Cem Ilkel | 6-4,7-5 |
| Challenger Chennai | 2018/02/13 06:20 | Cem Ilkel v Dmitry Popko | 4-6,7-6,6-2 |
| Davis Cup | 2018/02/03 10:20 | Takanyi Garanganga v Cem Ilkel | 6-4,7-5 |
| Australian Open Qual | 2018/01/10 05:05 | Salvatore Caruso v Cem Ilkel | 6-2,6-4 |
| Challenger Bangkok Qual | 2018/01/01 04:00 | Cem Ilkel v Evgeny Karlovskiy | 6-3,6-7,3-6 |
| Challenger Yokohama | 2018/02/28 02:30 | Tobias Kamke v Jason Jung | 6-4,6-2 |
| Challenger Yokohama | 2018/02/26 04:00 | Matteo Donati v Tobias Kamke | 7-6,2-6,5-7 |
| Challenger Kyoto | 2018/02/23 02:30 | Tobias Kamke v Tim Puetz | 4-6,0-6 |
| Challenger Kyoto | 2018/02/22 03:00 | Michal Przysiezny v Tobias Kamke | 3-6,4-6 |
| Challenger Kyoto | 2018/02/21 05:35 | Tobias Kamke v Edan Leshem | 6-2,6-2 |
| Challenger Cherbourg | 2018/02/16 10:30 | Tobias Kamke v Constant Lestienne | 3-6,6-4,3-6 |
| Challenger Cherbourg | 2018/02/14 17:00 | Malek Jaziri v Tobias Kamke | 6-7,2-6 |
| Challenger Cherbourg | 2018/02/12 12:10 | Tobias Kamke v Vaclav Safranek | 7-6,6-4 |