Stadium: Court 3 Opatija Round: 25 Ground: Clay
| ITF M15 Rovinj | 2021/03/18 10:10 | Martin Damm v Alexandar Lazarov | 6-1,5-7,6-4 |
| ITF M15 Rovinj | 2021/03/17 10:50 | Alexandar Lazarov v Uladzimir Ignatik | 6-4,4-6,7-5 |
| ITF M15 Porec | 2021/03/12 09:00 | Damien Wenger v Alexandar Lazarov | 7-6,6-0 |
| ITF M15 Porec | 2021/03/11 09:00 | Gergely Madarasz v Alexandar Lazarov | 1-6,3-6 |
| ITF M15 Porec | 2021/03/10 09:00 | Alexandar Lazarov v Vaclav Safranek | 7-5,6-4 |
| ITF M15 Antalya | 2021/02/01 14:50 | Alexandar Lazarov v Raul Brancaccio | 6-7,5-7 |
| ITF M15 Antalya | 2021/01/31 14:35 | Arthur Fils v Alexandar Lazarov | 1-6,1-6 |
| ITF M15 Antalya | 2021/01/31 08:00 | Giovanni Fonio v Alexandar Lazarov | 6-7,6-4,7-10 |
| ITF M15 Rovinj | 2021/03/15 11:30 | Sebastian Prechtel v Milan Welte | 6-1,4-6,1-10 |
| ITF M15 Rovinj | 2021/03/14 08:30 | Sebastian Prechtel v Paul Valsecchi | 6-0,7-5 |
| ITF M15 Porec | 2021/03/12 09:00 | Sebastian Prechtel v Alex Rybakov | 2-6,2-6 |
| ITF M15 Porec | 2021/03/11 10:30 | Antoine Cornut-Chauvinc v Sebastian Prechtel | 6-4,4-6,6-7 |
| ITF M15 Porec | 2021/03/10 09:00 | Dino Prizmic v Sebastian Prechtel | 5-7,1-6 |
| ITF M15 Porec | 2021/03/09 08:55 | Sebastian Prechtel v Duje Kekez | 6-3,4-6,10-6 |
| ITF M15 Porec | 2021/03/08 10:00 | Sebastian Prechtel v Kristijan Juhas | 6-3,7-5 |
| ITF M15 Porec | 2021/03/07 11:00 | Sebastian Prechtel v Luka Miklavcic | 6-1,6-2 |