Stadium: Court 2 Round: 26 Ground: Clay
| ITF M15 Cairo | 2021/01/22 08:00 | Facundo Diaz Acosta v Johan Nikles | 6-3,6-2 |
| ITF M15 Valldoreix | 2021/05/12 08:00 | Facundo Diaz Acosta v Thomas Laurent | 6-0,6-3 |
| ITF M15 Majadahonda | 2021/05/05 09:10 | Eduard Esteve Lobato v Facundo Diaz Acosta | 7-5,6-3 |
| Challenger Salinas 2 | 2021/04/28 17:00 | Facundo Diaz Acosta v Kevin King | 4-6,3-6 |
| Challenger Salinas 2 | 2021/04/27 14:30 | Facundo Diaz Acosta v Benjamin Lock | 6-1,6-2 |
| Challenger Salinas 2 | 2021/04/26 18:25 | Facundo Diaz Acosta v Mathieu Perchicot | 6-1,6-4 |
| Challenger Salinas | 2021/04/20 16:15 | Facundo Diaz Acosta v Tomas Barrios Vera | 2-6,2-6 |
| Challenger Salinas | 2021/04/19 14:30 | Facundo Diaz Acosta v Yusuke Takahashi | 6-2,6-2 |
| Challenger Salinas | 2021/04/18 17:55 | Facundo Diaz Acosta v Juan Diego Rojas | 6-1,6-0 |
| ITF M15 Valldoreix | 2021/05/12 12:05 | Johan Nikles v Pol Toledo Bague | 6-4,1-6,6-3 |
| ITF M15 Majadahonda | 2021/05/09 10:00 | Nuno Borges v Johan Nikles | 4-6,3-6 |
| ITF M15 Majadahonda | 2021/05/08 09:45 | Oriol Roca Batalla v Johan Nikles | 6-3,4-6,3-6 |
| ITF M15 Majadahonda | 2021/05/07 08:30 | Johan Nikles v Pedro Vives Marcos | 6-0,4-6,7-6 |
| ITF M15 Majadahonda | 2021/05/05 07:00 | Luca Van Assche v Johan Nikles | 1-6,4-6 |
| ITF M15 LPD Gran Canaria | 2021/04/30 11:15 | Johan Nikles v Eduard Esteve Lobato | 3-6,2-6 |
| ITF M15 LPD Gran Canaria | 2021/04/29 12:45 | Johan Nikles v Nicolas Moreno De Alboran | 6-3,6-4 |
| ITF M15 LPD Gran Canaria | 2021/04/28 09:55 | Johan Nikles v Marvin Netuschil | 6-3,6-2 |