Stadium: Court 3 Round: 62 Ground: Clay
| ITF M15 Curtea de Arges | 2021/08/09 09:00 | Nicolas Bruna v Ray Ho | 4-6,2-6 |
| ITF M15 Curtea de Arges | 2021/08/08 10:00 | Mihnea L.S. Turcu v Nicolas Bruna | 3-6,4-6 |
| ITF M15 Cairo | 2021/08/01 07:00 | Nicolas Bruna v Amr Asrawy | 6-4,1-6,10-12 |
| ITF M15 Cairo | 2021/07/26 08:00 | Nicolas Bruna v Lautaro Agustin Falabella | 2-6,1-6 |
| ITF M15 Cairo | 2021/07/25 07:00 | Nicolas Bruna v Sebastian Arcila | 6-4,6-2 |
| ITF M15 Cairo | 2021/07/21 09:55 | Ignacio Monzon v Nicolas Bruna | 3-6,6-0,6-3 |
| ITF M15 Cairo | 2021/07/20 08:00 | Nicolas Bruna v Imran D Abd Hazli | 6-2,6-1 |
| ITF M15 Cairo | 2021/07/19 08:30 | Nicolas Bruna v Federico Luzzo | 6-1,6-2 |
| ITF M15 Oldenzaal | 2021/08/16 10:00 | Jordi Garcia Mestre v Niklas Guttau | 4-6,1-6 |
| ITF M15 Oldenzaal | 2021/08/15 08:30 | Egill Sigurdsson v Niklas Guttau | 1-6,4-6 |
| ATP Hamburg | 2021/07/10 09:00 | Carlos Taberner v Niklas Guttau | 6-1,6-2 |
| ITF M15 Antalya | 2021/04/11 07:00 | Edoardo Graziani v Niklas Guttau | 6-4,6-1 |
| ITF M15 Antalya | 2021/04/06 07:00 | Niklas Guttau v Edoardo Graziani | 2-6,3-6 |
| ITF M15 Antalya | 2021/04/05 07:00 | Niklas Guttau v Tomas Lanik | 6-2,6-2 |
| ITF M15 Antalya | 2021/04/04 06:30 | Niklas Guttau v Michel Hopp | 6-1,6-3 |
| ITF M15 Sharm El Sheikh | 2021/03/16 10:10 | Niklas Guttau v Shao-Fan Liu | 3-6,6-1,4-10 |