Stadium: Court 3 Round: 54 Ground: Clay
| Brussels, Singles M-ITF-BEL-03A | 2019/07/29 12:40 | Lechevretel, Louis v Dielen, Liam | 6-2,2-6,7-10 |
| Lasne, Singles Qualifying M-ITF-BEL-02A | 2019/07/01 12:00 | Charles Broom v Dielen, Liam | 6-2,6-3 |
| ITF M25 Arlon | 2019/06/24 14:55 | Dielen, Liam v Boris Fassbender | 2-6,2-6 |
| ITF Belgium F10 Qual | 2018/08/26 12:00 | Ignacio Monzon v Dielen, Liam | 6-0,6-2 |
| ITF Belgium F10 Qual | 2018/08/25 08:00 | van Nieuwenhove, Jonathan v Dielen, Liam | 6-2,5-7,3-6 |
| ITF Belgium F8 | 2018/08/13 15:30 | Pisane, Tom v Dielen, Liam | 6-4,7-5 |
| ITF Belgium F8 | 2018/08/12 12:00 | Dielen, Liam v Duquesne, Goran | 5-7,4-6 |
| ITF Belgium F8 | 2018/08/11 08:00 | Dielen, Liam v Lenaerts, Yannick | 6-1,1-6,6-2 |
| Brussels, Singles M-ITF-BEL-03A | 2019/07/29 11:00 | Romeo, Felix v Hellfritsch, Lucas | 3-6,2-6 |
| Bad Schussenried, Singles Qualifying M-ITF-GER-10A | 2019/07/22 13:00 | Hellfritsch, Lucas v Gabriele Moghini | 1-6,1-6 |
| Bad Schussenried, Singles Qualifying M-ITF-GER-10A | 2019/07/22 08:00 | Hellfritsch, Lucas v Sanchez, Gabriel | 6-0,6-1 |
| ITF M15 Marburg | 2019/07/08 09:00 | Ma, William v Hellfritsch, Lucas | 3-6,7-6,3-10 |
| ITF M15 Marburg | 2019/07/08 08:00 | van Den Berg, Bart v Hellfritsch, Lucas | 6-1,7-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/01 07:30 | Hellfritsch, Lucas v Weng, Jing Long | 2-6,1-6 |
| 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 |