Stadium: Cancha 1 Round: 26 Ground: Clay
| ITF M25 Madrid | 2021/09/15 10:20 | Facundo Diaz Acosta v Nikolas Sanchez Izquierdo | 3-6,3-6 |
| ITF M25 Eupen | 2021/09/12 13:00 | Matteo Arnaldi v Facundo Diaz Acosta | 6-7,2-6 |
| ITF M25 Eupen | 2021/09/11 13:35 | Maxime Pauwels v Facundo Diaz Acosta | 4-6,4-6 |
| ITF M25 Eupen | 2021/09/10 10:55 | Colin Sinclair v Facundo Diaz Acosta | 4-6,5-7 |
| ITF M25 Eupen | 2021/09/09 07:30 | Tristan Schoolkate v Facundo Diaz Acosta | 1-6,7-6,2-6 |
| ITF M25 Eupen | 2021/09/07 11:00 | Benjamin Dhoe v Facundo Diaz Acosta | 0-6,2-6 |
| ITF M25 Říčany | 2021/09/03 08:30 | Robin Staněk v Facundo Diaz Acosta | 6-1,6-3 |
| ITF M25 Říčany | 2021/09/02 09:45 | Antonin Bolardt v Facundo Diaz Acosta | 2-6,3-6 |
| Challenger Ambato | 2021/09/22 15:00 | Diego Hidalgo v Facundo Mena | 4-6,3-6 |
| Challenger Quito | 2021/09/13 20:00 | Roberto Quiroz v Diego Hidalgo | 6-4,7-5 |
| Challenger Pozoblanco | 2021/07/19 15:00 | Michael Geerts v Diego Hidalgo | 7-6,6-3 |
| Challenger Pozoblanco | 2021/07/18 17:45 | Carlos Matarredona Valor v Diego Hidalgo | 4-6,5-7 |
| Challenger Amersfoort | 2021/07/12 10:40 | Michael Geerts v Diego Hidalgo | 7-6,6-3 |
| Challenger Amersfoort | 2021/07/11 14:00 | Guy Den Ouden v Diego Hidalgo | 3-6,6-7 |
| Challenger Braunschweig | 2021/07/05 09:30 | Diego Hidalgo v Dayne Kelly | 3-6,7-6,3-6 |
| Challenger Braunschweig | 2021/07/04 10:10 | Igor Sijsling v Diego Hidalgo | 3-6,6-3,4-6 |