Stadium: Court 8 Round: 54 Ground: Clay
| ITF M15 Alkmaar | 2019/06/26 16:50 | Jesper De Jong v Hellfritsch, Lucas | 6-3,6-4 |
| ITF M15 Alkmaar | 2019/06/25 09:00 | Hellfritsch, Lucas v Matthew Dellavedova | 0-6,6-0,10-2 |
| ITF M15 Alkmaar | 2019/06/24 13:00 | Hellfritsch, Lucas v Bosnjak, Mislav | 6-4,4-6,10-6 |
| Kaltenkirchen, Singles Qualifying M-ITF-GER-05A | 2019/06/10 08:00 | Hellfritsch, Lucas v Remy Bertola | 1-6,4-6 |
| ITF - M15 Antalya | 2019/05/21 07:15 | Hellfritsch, Lucas v Hiramatsu, Shinnosuke | 4-6,0-6 |
| ITF - M15 Antalya | 2019/04/25 09:20 | Dimitar Kuzmanov v Hellfritsch, Lucas | 6-2,6-3 |
| ITF - M15 Antalya | 2019/04/24 09:10 | Hellfritsch, Lucas v Farmer, Elliott | 6-0,6-3 |
| ITF - M15 Antalya | 2019/04/23 07:00 | Hellfritsch, Lucas v Uvarov, Andrey | 6-4,6-3 |
| ITF Netherlands F6 | 2018/08/26 07:00 | van Baal, Aloys Johannes Willem v Weng, Jing Long | 4-6,7-5,6-3 |
| ITF Belgium F7 Qual | 2018/08/04 07:30 | Nickels, Christophe v Weng, Jing Long | 6-4,6-2 |