Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Zilina | 2021/08/31 07:30 | Lukas H Lilleengen v Janos Fekete | 6-1,6-1 |
| ITF M15 Bratislava | 2021/08/26 09:15 | Lukas H Lilleengen v Pavel Nejedly | 2-6,3-6 |
| ITF M15 Bratislava | 2021/08/25 10:05 | Eero Vasa v Lukas H Lilleengen | 5-7,7-6,5-7 |
| ITF M15 Bratislava | 2021/08/24 08:00 | Antonin Stepanek v Lukas H Lilleengen | 6-0,4-6,3-10 |
| ITF M15 Bratislava | 2021/08/23 09:00 | Patrik Jancovic v Lukas H Lilleengen | 0-6,2-6 |
| ITF M15 Bratislava | 2021/08/17 08:00 | Zsombor Velcz v Lukas H Lilleengen | 7-5,6-2 |
| ITF M15 Bratislava | 2021/08/16 12:00 | Isa Mammetgulyyev v Lukas H Lilleengen | 3-6,1-6 |
| ITF M15 Frederiksberg | 2021/08/01 08:00 | Lukas H Lilleengen v Facundo Yunis | 6-3,1-6,5-10 |
| ITF M15 Zilina | 2021/08/31 09:30 | Dominik Kellovsky v Tomas Lanik | 6-1,6-4 |
| ITF M15 Zilina | 2021/08/30 11:30 | Dominik Kellovsky v Sven Corbinais | 3-6,6-2,10-6 |
| ITF M15 Lodz | 2021/08/16 14:00 | Dominik Kellovsky v Valerio Aboian | 0-6,1-6 |
| ITF M25 Frankfurt am Main | 2021/08/09 10:50 | Daniel Cukierman v Dominik Kellovsky | 6-2,6-3 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/03 13:35 | Wilson Leite v Dominik Kellovsky | 6-4,6-2 |
| ITF M25 Wroclaw | 2021/06/28 11:00 | Toby Alex Kodat v Dominik Kellovsky | 6-3,6-4 |
| ITF M25 Wroclaw | 2021/06/27 14:00 | Matteo Donati v Dominik Kellovsky | 6-2,6-7,6-10 |
| Czech Extraliga | 2020/12/12 09:00 | Dalibor Svrcina v Dominik Kellovsky | 7-6,6-3 |