Stadium: Clay 7 Round: 62 Ground: Hardcourt outdoor
| ITF Turkey F31 | 2018/10/07 07:00 | Melnic, Vladislav v Hellfritsch, Lucas | 7-6,6-2 |
| ITF Turkey F31 | 2018/10/06 07:00 | Coskun, Berke Eser v Hellfritsch, Lucas | 2-6,2-6 |
| ITF Turkey F30 | 2018/10/04 07:00 | Hellfritsch, Lucas v Michael Vrbensky | 4-6,2-6 |
| ITF Turkey F30 | 2018/10/03 08:50 | Alekseenko, Vadim v Hellfritsch, Lucas | 4-6,6-3,2-6 |
| ITF Turkey F30 | 2018/10/01 07:30 | Mert Alkaya v Hellfritsch, Lucas | 3-6,2-6 |
| ITF Netherlands F6 | 2018/08/26 07:00 | Butsch, Justin v Hellfritsch, Lucas | 6-2,6-2 |
| ITF Netherlands F6 | 2018/08/25 08:00 | Persad, Aneil v Hellfritsch, Lucas | 2-6,2-6 |
| ITF Netherlands F5 | 2018/08/21 09:55 | Nik Razborsek v Hellfritsch, Lucas | 6-4,7-6 |
| ITF Turkey F32 | 2018/10/13 07:00 | Kolly, Bastien v Durguti, Besir | 6-3,6-0 |
| ITF Switzerland F4 | 2018/08/27 08:35 | Florent Bax v Kolly, Bastien | 6-1,6-3 |
| ITF Switzerland F3 | 2018/08/19 08:00 | Grandjean, Nicolas v Kolly, Bastien | 6-3,6-0 |
| ITF Tunisia F25 | 2018/06/24 08:30 | Portales, Nino v Kolly, Bastien | 6-4,6-3 |
| ITF Tunisia F24 | 2018/06/16 08:00 | Kolly, Bastien v Vrzesinski, Robertas | 1-6,3-6 |
| Turkey F16, Singles Qualifying | 2018/04/23 07:30 | Kolly, Bastien v Schmidt, Gabriel | 4-6,2-6 |
| Turkey F16, Singles Qualifying | 2018/04/22 09:30 | Lazar Vojinovic v Kolly, Bastien | 6-7,6-7 |
| Turkey F16, Singles Qualifying | 2018/04/21 09:30 | Kolly, Bastien v Busch, Ruben | 6-3,6-0 |