Stadium: Court 6 Round: 44 Ground: Clay
| 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 Sibenik | 2021/05/19 12:20 | Peter Goldsteiner v David Pichler | 3-6,2-6 |
| ITF M15 Sibenik | 2021/05/18 09:35 | Elgin Khoeblal v Peter Goldsteiner | 1-6,5-7 |
| ITF M15 Sibenik | 2021/05/17 14:55 | Federico Marchetti v Peter Goldsteiner | 5-7,0-6 |
| ITF M15 Sibenik | 2021/05/16 15:00 | Alen Moritz Hodzic v Peter Goldsteiner | 6-3,5-7,5-10 |
| ITF M25 Praha | 2021/05/12 07:30 | Mischa Zverev v Peter Goldsteiner | 7-6,5-7,6-1 |
| ITF M25 Velenje | 2021/07/05 13:50 | Marco De Rosa v Tim Heger | 4-6,2-6 |
| ITF M25 Velenje | 2021/07/04 07:30 | Alexis Boureau v Tim Heger | 4-6,4-6 |
| ITF M25 Beograd | 2021/06/28 10:00 | Tim Heger v Strahinja Rakic | 1-6,3-6 |
| ITF M15 Sarajevo | 2021/06/02 12:50 | Tim Heger v Hernan Casanova | 1-6,6-3,2-6 |
| ITF M15 Sarajevo | 2021/06/01 08:00 | Tim Heger v Moritz Trocker | 6-3,7-6 |
| ITF M15 Sarajevo | 2021/05/31 12:00 | Tim Heger v Erdem Isitan | 6-4,4-6,10-7 |
| ITF M25 Kiseljak | 2021/05/27 10:30 | Tim Heger v Matheus P De Almeida | 3-6,3-6 |
| ITF M25 Kiseljak | 2021/05/26 10:00 | Domagoj Biljesko v Tim Heger | 6-7,6-2,3-6 |