Stadium: Court 1 Round: 27 Ground: Clay
| Challenger Almaty MD | 2021/06/11 09:55 | Basic/Serdarusic v Manafov/Tiurnev | 6-4,3-6,9-11 |
| Challenger Almaty MD | 2021/06/10 07:40 | Basic/Serdarusic v Bergs/Coppejans | 6-3,7-6 |
| Challenger Almaty MD | 2021/06/09 07:25 | M R Alves/Menezes v Basic/Serdarusic | 3-6,0-6 |
| Challenger Napoli MD | 2021/10/07 13:30 | Berrettini/Brancaccio v Cerretani/Fallert | 3-6,7-6,6-10 |
| Challenger Istanbul MD | 2021/09/17 11:55 | Albot/Cozbinov v Cerretani/Fallert | 7-6,6-3 |
| Challenger Istanbul MD | 2021/09/16 12:35 | Balaji/Moriya v Cerretani/Fallert | 6-3,6-7,7-10 |
| Challenger Istanbul MD | 2021/09/15 14:00 | Grenier/Muller v Cerretani/Fallert | 1-6,5-7 |
| Challenger Banja Luka MD | 2021/09/10 11:00 | Cerretani/Fallert v Sancic/Serdarusic | 6-7,3-6 |
| Challenger Banja Luka MD | 2021/09/09 09:00 | Cozbinov/Echargui v Cerretani/Fallert | 6-7,5-7 |
| Challenger Banja Luka MD | 2021/09/07 14:20 | Pozzi/Weis v Cerretani/Fallert | 4-6,6-7 |