Stadium: Court 2 Indoor Round: 44 Ground: Clay
| 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 Prague | 2021/05/12 07:30 | Mischa Zverev v Peter Goldsteiner | 7-6,5-7,6-1 |
| ITF M25 Prague | 2021/05/11 09:15 | Renta Tokuda v Peter Goldsteiner | 3-6,4-6 |
| ITF M25 Prague | 2021/05/10 08:00 | Peter Goldsteiner v Aidan Mchugh | 5-7,7-5,11-9 |