Stadium: Court 6 Round: 62 Ground: Clay
| ITF - M15 Sibenik | 2021/04/19 07:55 | Peter Goldsteiner v Lovre Erceg | 6-1,6-0 |
| ITF - M15 Opatija | 2021/03/23 09:00 | Giacomo Dambrosi v Peter Goldsteiner | 6-3,6-2 |
| ITF - M15 Opatija | 2021/03/22 08:00 | Mate Voros v Peter Goldsteiner | 2-6,5-7 |
| ITF - M15 Opatija | 2021/03/21 08:00 | Anze Arh v Peter Goldsteiner | 6-0,2-6,6-10 |
| ITF - M15 Rovinj | 2021/03/15 08:00 | Peter Goldsteiner v Gorazd Srbljak | 3-6,4-6 |
| ITF - M25 Vale Do Lobo | 2021/03/10 11:30 | Peter Goldsteiner v Goncalo Falcao | 2-6,3-6 |
| ITF - M25 Vale Do Lobo | 2021/03/09 11:35 | Peter Goldsteiner v Adrien Gobat | 6-4,6-0 |
| ITF - M25 Vale Do Lobo | 2021/03/08 11:00 | Peter Goldsteiner v Francisco Faria | 4-6,6-3,10-5 |
| ITF - M15 Sibenik | 2021/04/19 13:50 | Matthias Uwe Kask v Luigi Castelletti | 5-7,6-2,15-17 |
| ITF - M15 Monastir | 2021/04/11 08:00 | Luigi Castelletti v Louis Allen | 4-6,6-2,3-10 |
| ITF - M15 Monastir | 2021/04/04 09:00 | Luigi Castelletti v Michal Mikula | 3-6,6-7 |
| ITF - M15 Monastir | 2021/03/14 11:00 | Luigi Castelletti v Yanais Laurent | 0-6,2-6 |
| ITF - M15 Monastir | 2021/03/07 10:30 | Luigi Castelletti v Sabit Suntic | 2-6,5-7 |
| ITF - M15 Monastir | 2021/02/28 10:30 | Luigi Castelletti v Milan Drinic | 4-6,0-6 |
| ITF - M15 Monastir | 2021/02/22 08:00 | Luigi Castelletti v Fons Van Sambeek | 6-7,4-6 |
| ITF - M15 Monastir | 2021/02/21 11:00 | Erwin Troebinger v Luigi Castelletti | 6-7,2-6 |