Stadium: Central Round: 26 Ground: Clay
| Puchar Davisa | 2021/06/18 12:00 | Arneodo/Nys v Calzi/Knaff | 6-4,6-0 |
| Puchar Davisa | 2021/06/17 10:50 | Calzi/Knaff v Degabriele/Delicata | 6-1,6-1 |
| Puchar Davisa | 2021/06/16 11:30 | Calzi/Knaff v Carr/O'Hare | 3-6,4-6 |
| ITF Germany F6 MD | 2018/07/05 13:30 | Cornea/Negritu v Calzi/Knaff | 6-2,6-3 |
| ITF Germany F6 MD | 2018/07/04 16:15 | Kopeinigg/Maier v Calzi/Knaff | 5-7,3-6 |
| ITF Belgium F2 MD | 2018/06/27 16:00 | Calzi/Knaff v Dellavedova/Paul | 4-6,1-6 |
| ITF Belgium F2 MD | 2018/06/26 11:55 | Desein/Panfil v Calzi/Knaff | 3-6,6-7 |
| ITF Belgium F8 MD | 2017/08/08 09:00 | de Krom/Vanneste v Calzi/Knaff | 6-2,6-1 |