| UTR Pro Tennis Series Belgrado | 2021/07/08 14:15 | Giacomo Revelli v Alexander Lazov | 4-6,6-1,5-2 |
| UTR Pro Tennis Series Belgrado | 2021/07/07 07:30 | Giacomo Revelli v Luka Vukovic | 6-0,6-0 |
| UTR Pro Tennis Series Belgrado | 2021/07/06 09:00 | Giacomo Revelli v Alex Kuperstein | 6-7,6-4,0-6 |
| UTR Pro Tennis Series Belgrado | 2021/07/05 10:30 | Giacomo Revelli v Dusan Milanovic | 6-3,1-6,6-7 |
| ITF M15 Monastir | 2021/06/27 08:00 | Alex Jones v Giacomo Revelli | 6-4,6-4 |
| ITF M15 Monastir | 2021/06/20 09:00 | Perry Gregg v Giacomo Revelli | 7-6,3-6,10-8 |
| ITF M15 Monastir | 2021/06/13 10:00 | Daniel Rodrigues v Giacomo Revelli | 6-0,4-6,10-7 |
| ITF M15 Monastir | 2021/05/31 12:30 | Mauro De Maio v Giacomo Revelli | 6-3,6-2 |
| UTR Pro Tennis Series Belgrado | 2021/07/08 09:00 | Nikola Slavic v Olexiy Kolisnyk | 1-6,4-6 |
| UTR Pro Tennis Series Belgrado | 2021/07/07 10:30 | Nikola Slavic v Constant De La Bassetiere | 6-4,5-4 |
| UTR Pro Tennis Series Belgrado | 2021/07/06 14:00 | Nikola Slavic v Michalis Sakellaridis | 6-3,6-6 |
| UTR Pro Tennis Series Belgrado | 2021/07/05 07:30 | Nikola Slavic v Dusan Obradovic | 6-7,6-7 |
| ITF M25 Belgrado | 2021/06/30 08:45 | Nikola Slavic v Akira Santillan | 1-6,1-6 |
| ITF M25 Belgrado | 2021/06/29 09:00 | George Botezan v Nikola Slavic | 4-6,2-6 |
| ITF M25 Belgrado | 2021/06/28 07:00 | Nikola Slavic v Toby Martin | 6-4,6-3 |
| ITF M25 Belgrado | 2021/06/27 07:00 | Paul Valsecchi v Nikola Slavic | 4-6,4-6 |