Stadium: Court 6 Round: 62 Ground: Clay
| ITF M15 Poprad | 2021/07/04 08:00 | Janos Fekete v Lahky, Nikolas | 6-2,7-6 |
| 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 M25 Telfs | 2021/07/12 07:55 | Ondrej Horak v Samuel Puskar | 6-3,6-4 |
| ITF M15 Poprad | 2021/07/07 11:30 | Penzlin, Julien v Samuel Puskar | 6-4,7-6 |
| ITF M15 Poprad | 2021/07/05 08:00 | Samuel Puskar v Minarik, Kristof | 6-3,7-6 |
| ITF M15 Poprad | 2021/07/04 08:00 | Samuel Puskar v Ondrej Valek | 7-5,6-1 |
| ITF M25 Wroclaw | 2021/06/27 15:30 | Samuel Puskar v Soderlund, Carl | 6-4,1-6,8-10 |
| ITF M15 Skopje | 2021/06/06 07:30 | Samuel Puskar v Vianello, Michele | 6-4,0-6,6-10 |
| ITF - M15 Monastir | 2021/04/18 13:00 | Remy Bertola v Samuel Puskar | 6-3,6-4 |
| ITF - M15 Monastir | 2021/04/12 09:00 | Samuel Puskar v Mikula, Michal | 2-6,1-6 |