Stadium: Court 1 Round: 62 Ground: Clay
| ITF M15 Prijedor | 2021/05/09 12:30 | Matic Spec v Luka Miklavcic | 3-6,6-3,8-10 |
| ITF M15 St Petersburg | 2021/04/17 09:45 | Matic Spec v Yanki Erel | 6-7,2-6 |
| ITF M15 St Petersburg | 2021/04/16 07:55 | Matic Spec v Alexey Zakharov | 6-2,6-4 |
| ITF M15 St Petersburg | 2021/04/15 07:00 | Jakub Paul v Matic Spec | 6-7,6-4,3-6 |
| ITF M15 St Petersburg | 2021/04/14 09:15 | Matic Spec v Alafia Ayeni | 6-3,6-4 |
| ITF M15 St Petersburg | 2021/04/12 10:15 | Matic Spec v Daniel Ibragimov | 6-1,6-1 |
| ITF M15 St Petersburg Qual | 2021/04/11 07:00 | Matic Spec v Maksim Starostin | 6-3,6-2 |
| ITF M15 St Petersburg | 2021/04/08 09:00 | Matic Spec v Aristarkh Safonov | 3-6,5-7 |
| ITF M15 Monastir | 2021/04/18 10:00 | Leyton Rivera v Jonas Greif | 6-1,6-2 |
| ITF M15 Monastir | 2021/04/11 08:00 | Jonas Greif v Yuta Kawahashi | 2-6,3-6 |
| ITF M15 Monastir | 2021/03/07 08:00 | Jonas Greif v Luca Castagnola | 2-6,0-6 |
| ITF M15 Monastir | 2021/02/28 09:00 | Jonas Greif v Leonardo Civita-Telles | 0-6,5-7 |
| ITF M15 Monastir | 2021/02/22 08:00 | Jonas Greif v Kenneth Raisma | 2-6,2-6 |
| ITF M15 Monastir | 2021/02/21 11:00 | Jonas Greif v Thomas George Brun | 6-4,6-0 |
| ITF M15 Monastir | 2021/02/15 09:00 | Jonas Greif v Jesse Timmermans | 3-6,1-6 |
| ITF M15 Monastir | 2021/02/14 09:00 | Alessandro Ingarao v Jonas Greif | 6-7,2-6 |