Stadium: MTA 02 Round: 62 Ground: Clay
| ITF - M15 Antalya | 2019/09/23 11:00 | Hellfritsch, Lucas v Janos Fekete | 3-6,7-6,10-1 |
| ITF M15 Bratislava | 2021/03/01 12:00 | Neil Oberleitner v Janos Fekete | 6-2,6-7,10-3 |
| ITF - M15 Sharm El Sheikh | 2021/01/31 07:00 | Yu Hsiou Hsu v Janos Fekete | 6-1,6-2 |
| ITF M15 Bratislava | 2020/11/23 12:00 | Mikula, Michal v Janos Fekete | 7-5,6-3 |
| ITF - M15 Sharm El Sheikh | 2020/11/08 12:30 | Illya Beloborodko v Janos Fekete | 6-1,6-3 |
| ITF - M15 Sharm El Sheikh | 2020/11/02 10:30 | Dhoe, Benjamin v Janos Fekete | 6-3,1-6,11-9 |
| ITF - M15 Sharm El Sheikh | 2020/11/01 12:00 | Ratsaratany, Loic v Janos Fekete | 6-7,0-6 |
| ITF M25 Prague | 2020/09/13 12:00 | Stepan Pecak v Janos Fekete | 6-2,6-4 |
| Slovakian International | 2020/07/23 10:00 | Tomas Machac v Janos Fekete | 6-2,6-3 |
| ITF - M15 Sharm El Sheikh | 2021/02/14 16:00 | Maxted, Lui v Hellfritsch, Lucas | 7-5,6-3 |
| ITF - M15 Sharm El Sheikh | 2021/02/07 06:30 | Hellfritsch, Lucas v Mate Valkusz | 3-6,5-7 |
| ITF - M15 Sharm El Sheikh | 2021/01/31 07:00 | Hellfritsch, Lucas v Constantinos Koshis | 2-6,5-7 |
| German Championship | 2020/12/07 15:00 | Hellfritsch, Lucas v Jakob Schnaitter | 4-6,5-6 |
| ITF - M15 Monastir | 2020/10/18 13:00 | Hellfritsch, Lucas v Gabriel Roveri Sidney | 6-7,3-6 |
| ITF - M15 Monastir | 2020/10/14 07:55 | Hellfritsch, Lucas v Guido Ivan Justo | 2-6,3-6 |
| ITF - M15 Monastir | 2020/03/09 08:00 | Hellfritsch, Lucas v Savva Polukhin | 2-6,1-6 |
| ITF - M15 Oberhaching | 2020/02/16 10:30 | de Rossi, Marco v Hellfritsch, Lucas | 5-7,6-2,10-2 |