Stadium: Court 3 Opatija Round: 26 Ground: Clay
| ITF - M15 Opatija | 2021/03/23 12:30 | Alexandar Lazarov v Prechtel, Sebastian | 6-7,4-6 |
| ITF - M15 Rovinj | 2021/03/15 11:30 | Prechtel, Sebastian v Milan Welte | 6-1,4-6,1-10 |
| ITF - M15 Rovinj | 2021/03/14 08:30 | Prechtel, Sebastian v Paul Valsecchi | 6-0,7-5 |
| ITF - M15 Porec | 2021/03/12 09:00 | Prechtel, Sebastian v Alex Rybakov | 2-6,2-6 |
| ITF - M15 Porec | 2021/03/11 10:30 | Cornut-Chauvinc, Antoine v Prechtel, Sebastian | 6-4,4-6,6-7 |
| ITF - M15 Porec | 2021/03/10 09:00 | Dino Prizmic v Prechtel, Sebastian | 5-7,1-6 |
| ITF - M15 Porec | 2021/03/09 08:55 | Prechtel, Sebastian v Kekez, Duje | 6-3,4-6,10-6 |
| ITF - M15 Porec | 2021/03/08 10:00 | Prechtel, Sebastian v Kristijan Juhas | 6-3,7-5 |
| ITF - M15 Opatija | 2021/03/24 09:00 | Oleksandr Ovcharenko v Francesco Passaro | 6-2,6-3 |
| ITF - M15 Opatija | 2021/03/23 09:00 | Oleksandr Ovcharenko v Matyas Fuele | 6-3,6-2 |
| ITF - M15 Opatija | 2021/03/22 10:15 | Oleksandr Ovcharenko v Emesz, Benedikt | 6-1,6-3 |
| ITF - M15 Opatija | 2021/03/21 11:00 | Oleksandr Ovcharenko v Krstanovic, Josip | 6-4,6-0 |
| ITF - M15 Antalya | 2021/03/12 07:00 | Matheus P De Almeida v Oleksandr Ovcharenko | 6-3,6-2 |
| ITF - M15 Antalya | 2021/03/12 07:00 | Matheus Almeida v Oleksandr Ovcharenko | 6-3,6-2 |
| ITF - M15 Antalya | 2021/03/10 11:20 | Oleksandr Ovcharenko v Mathys Erhard | 6-3,7-6 |
| ITF - M15 Antalya | 2021/03/09 07:00 | Stefan Palosi v Oleksandr Ovcharenko | 4-6,3-6 |