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