Stadium: Clay 5 Round: 62 Ground: Clay
| ITF Turkey F31 | 2018/10/06 07:00 | Jonas Schaer v Charles Tzicas | 3-6,7-6,6-1 |
| ITF Turkey F30 | 2018/10/01 07:30 | Lucas Gerch v Jonas Schaer | 6-4,6-4 |
| ITF Turkey F30 | 2018/09/30 10:30 | Jonas Schaer v Stefan Cizelj-Zivkovic | 6-2,6-3 |
| ITF Switzerland F5 | 2018/09/03 07:30 | Eduardo Dischinger v Jonas Schaer | 6-3,6-0 |
| ITF Switzerland F5 | 2018/09/02 08:30 | Jonas Schaer v Flamur Selmani | 6-0,6-0 |
| ITF Switzerland F1 Qual | 2018/02/05 10:20 | Fran Zvonimir Zgombic v Jonas Schaer | 3-6,6-2,6-2 |
| ITF Switzerland F1 Qual | 2017/02/05 11:30 | Simeon Rossier v Jonas Schaer | 6-3,6-2 |
| ITF Switzerland F1 Qual | 2017/02/04 11:30 | Jonas Schaer v Timo Lanz | 6-3,6-3 |
| ITF Turkey F31 | 2018/10/06 07:00 | Cosmin Ontica v Ruben Konings | 3-6,7-5,6-3 |
| 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 |