Stadium: Court 6 Round: 62 Ground: Clay
| ITF M25 Prague | 2021/05/12 07:30 | Zverev, Mischa v Goldsteiner, Peter | 7-6,5-7,6-1 |
| ITF M25 Prague | 2021/05/11 09:15 | Renta Tokuda v Goldsteiner, Peter | 3-6,4-6 |
| ITF M25 Prague | 2021/05/10 08:00 | Goldsteiner, Peter v Aidan Mchugh | 5-7,7-5,11-9 |
| ITF M25 Prague | 2021/05/09 11:00 | Krystof Zapsky v Goldsteiner, Peter | 3-6,4-6 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/21 11:20 | Aldin Setkic v Goldsteiner, Peter | 6-2,6-4 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/20 08:00 | Goldsteiner, Peter v Luigi Castelletti | 7-5,1-6,12-10 |
| Sibenik, Singles M-ITF-CRO-05A | 2021/04/19 07:55 | Goldsteiner, Peter v Lovre Erceg | 6-1,6-0 |
| ITF - M15 Opatija | 2021/03/23 09:00 | Dambrosi, Giacomo v Goldsteiner, Peter | 6-3,6-2 |