Stadium: Court 2 Round: 62 Ground: Clay
| ITF - M25 Telfs | 2021/07/13 07:30 | Peter Goldsteiner v Philip Bachmaier | 6-0,3-6,4-10 |
| ITF - M25 Velenje | 2021/07/09 09:00 | Peter Goldsteiner v Gonzalo Lama | 2-6,4-6 |
| ITF - M25 Velenje | 2021/07/08 09:45 | Oscar Jose Gutierrez v Peter Goldsteiner | 6-7,6-3,4-6 |
| ITF - M25 Velenje | 2021/07/07 08:00 | Peter Goldsteiner v Gal Emersic Potocnik | 6-1,6-0 |
| ITF - M25 Velenje | 2021/07/06 10:10 | Peter Goldsteiner v Tim Heger | 6-1,6-4 |
| ITF - M25 Velenje | 2021/07/05 16:20 | Peter Goldsteiner v Roko Horvat | 7-6,6-4 |
| ITF - M15 Sarajevo | 2021/05/31 10:00 | Peter Goldsteiner v Petar Jovanovic | 6-7,4-6 |
| ITF - M25 Kiseljak | 2021/05/25 12:40 | Zsombor Piros v Peter Goldsteiner | 6-3,7-5 |
| 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 - M25 Most | 2021/05/23 14:00 | George Loffhagen v Ondrej Valek | 4-6,1-6 |
| ITF - M25 Jablonec Nad Nisou | 2021/05/16 11:30 | Ondrej Valek v Lucas Bouquet | 7-5,2-6,7-10 |
| ITF M25 - Praga | 2021/05/09 08:30 | Ondrej Valek v Jean Thirouin | 6-3,6-7,4-10 |
| Challenger - Prostejov | 2019/06/02 08:00 | Roman Jebavy v Ondrej Valek | 6-4,6-3 |