Stadium: Court 3 Round: 54 Ground: Clay
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/17 14:55 | Janos Fekete v Amaury Raynel | 6-7,6-2,4-10 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/05/16 12:30 | Matyas Fuele v Janos Fekete | 3-6,1-6 |
| ITF - M15 Antalya | 2021/04/11 07:00 | Janos Fekete v Ovcharov, Alexander | 2-6,3-6 |
| ITF - M15 Antalya | 2021/04/04 10:00 | Janos Fekete v Hellfritsch, Lucas | 5-7,5-7 |
| 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 M25 Wroclaw | 2021/06/27 12:30 | Novansky, Michal v Lahky, Nikolas | 6-4,6-4 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/05/31 12:00 | Trocker, Moritz v Lahky, Nikolas | 6-2,6-1 |
| Sarajevo, Singles Main, M-ITF-BIH-05A | 2021/05/30 10:30 | Lahky, Nikolas v Pjevcevic, Petar | 6-3,7-5 |
| ITF - M15 Bucarest | 2021/05/23 08:30 | Lahky, Nikolas v Filippo Speziali | 3-6,3-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/18 08:00 | Lahky, Nikolas v Mayeul Darras | 5-7,7-6,4-10 |
| ITF - M15 Opatija | 2021/03/21 08:00 | Aleksandre Bakshi v Lahky, Nikolas | 7-6,6-2 |
| ITF - M15 Rovinj | 2021/03/15 08:00 | Ignacio Monzon v Lahky, Nikolas | 6-1,6-4 |
| ITF M15 Bratislava | 2021/03/08 12:00 | Milos Karol v Lahky, Nikolas | 6-3,6-2 |