Stadium: Clay 8 Round: 62 Ground: Clay
| ITF Turkey F30 | 2018/09/29 11:00 | Ruben Konings v Cosmin Ontica | 6-4,6-1 |
| ITF Turkey F30 | 2018/09/29 11:00 | Ruben Konings v Cosmin Ontica | 6-4,6-1 |
| Challenger - Sibiu | 2018/09/15 08:00 | Peter Bothwell v Cosmin Ontica | 6-3,7-5 |
| ITF Romania F12 | 2018/09/01 10:00 | Cosmin Ontica v Kenta Kurita | 4-6,4-6 |
| ITF Romania F11 | 2018/08/26 13:00 | Vladimir Filip v Cosmin Ontica | 7-5,6-4 |
| ITF Romania F11 | 2018/08/25 08:00 | Robert Damian Savin v Cosmin Ontica | 2-6,1-6 |
| ITF Romania F10 | 2018/08/19 10:30 | Cosmin Ontica v Victor Vlad Cornea | 5-7,6-7 |
| ITF Romania F10 | 2018/08/18 10:00 | Cosmin Ontica v Alexandru Ionel Stroe | 6-1,6-1 |
| ITF Romania F9 | 2018/08/12 08:30 | Cosmin Ontica v Petru-Alexandru Luncanu | 3-6,2-6 |
| ITF Turkey F30 | 2018/10/03 07:00 | Cengiz Aksu v Ruben Konings | 6-0,6-1 |
| ITF Turkey F30 | 2018/10/01 07:30 | Ruben Konings v Noah Thurner | 6-1,6-2 |
| ITF Turkey F30 | 2018/09/30 10:30 | Ruben Konings v Moritz Thiem | 7-6,6-2 |
| ITF Turkey F30 | 2018/09/29 11:00 | Ruben Konings v Cosmin Ontica | 6-4,6-1 |
| ITF Netherlands F6 | 2018/08/28 09:50 | Mick Veldheer v Ruben Konings | 6-3,7-6 |
| ITF Netherlands F5 | 2018/08/21 12:20 | Marc Dijkhuizen v Ruben Konings | 6-2,6-1 |
| ITF Netherlands F5 | 2018/08/19 10:00 | Ruben Konings v Aloys J W Van Baal | 6-3,6-7,7-6 |
| ITF Netherlands F5 | 2018/08/18 08:00 | Ruben Konings v Tim Van Der Horst | 6-2,6-2 |