Stadium: Court 1 Round: 54 Ground: Carpet indoor
| ITF M25 - Prostejov | 2021/08/15 09:00 | Vojtech Vlkovsky v Ondrej Valek | 6-4,4-6,9-11 |
| ITF M15 - Opava | 2021/11/14 12:30 | Mark Havlicek v Ondrej Valek | 7-6,6-7,5-10 |
| ITF M25 - Ricany | 2021/08/30 08:00 | Ondrej Valek v Noel Larwig | 4-6,2-6 |
| ITF M25 - Prostejov | 2021/08/16 09:50 | Nico Hornitschek v Ondrej Valek | 6-1,6-2 |
| ITF M25 - Prostejov | 2021/08/15 09:00 | Vojtech Vlkovsky v Ondrej Valek | 6-4,4-6,9-11 |
| ITF M25 - Kottingbrunn | 2021/07/18 07:30 | Peter Goldsteiner v Ondrej Valek | 6-2,6-2 |
| ITF M15 - Poprad | 2021/07/04 08:00 | Samuel Puskar v Ondrej Valek | 7-5,6-1 |
| ITF M25 - Most | 2021/05/25 08:00 | Ondrej Valek v Sean Cuenin | 2-6,2-6 |
| ITF M25 - Most | 2021/05/24 08:00 | Ondrej Valek v Alexander Wolfschmidt | 6-2,6-3 |
| ITF M15 - Opava | 2021/11/14 14:00 | Vojtech Vlkovsky v Daniel Paty | 6-4,6-4 |
| ITF M15 - Torello | 2021/11/02 10:30 | Aaron Cohen v Vojtech Vlkovsky | 6-1,2-6,10-5 |
| ITF M15 - Torello | 2021/11/01 12:00 | Pablo Riva v Vojtech Vlkovsky | 2-6,3-6 |
| ITF M25 - Pardubice | 2021/09/22 07:55 | Vojtech Vlkovsky v Martins Podzus | 3-6,2-6 |
| ITF M25 - Madrid | 2021/09/13 09:00 | Nikolas Sanchez Izquierdo v Vojtech Vlkovsky | 6-4,6-4 |
| ITF M25 - Madrid | 2021/09/12 13:00 | Inaki Cabrera Bello v Vojtech Vlkovsky | 3-6,0-6 |
| ITF M15 - Bad Waltersdorf | 2021/08/30 07:00 | Vojtech Vlkovsky v Hasan Ibrahim | 5-7,6-2,10-12 |
| ITF M25 - Poznan | 2021/08/22 08:00 | Harry Wendelken v Vojtech Vlkovsky | 6-3,6-4 |