| UTR Pro Tennis Series Barcelona | 2021/11/11 15:00 | Xavier Gabarro v Diego F Flores | 4-6,3-6 |
| ITF M15 Torello | 2021/11/02 11:00 | Diego F Flores v Marco Brugnerotto | 7-5,5-7,4-6 |
| Challenger Santiago | 2021/10/14 20:55 | Diego F Flores v Tomas Barrios Vera | 0-6,1-6 |
| Challenger Santiago | 2021/10/12 14:00 | Rafael Matos v Diego F Flores | 2-6,6-4,4-6 |
| Challenger Santiago | 2021/10/04 22:55 | Diego F Flores v Nick Chappell | 3-6,6-3,5-7 |
| ITF M15 Melilla | 2021/09/25 07:00 | Oscar Mesquida Berg v Diego F Flores | 6-3,7-5 |
| ITF M15 Melilla | 2021/09/24 10:00 | Aaron Cohen v Diego F Flores | 3-6,6-4,3-6 |
| ITF M25 Sintra | 2021/09/15 11:55 | Yuta Shimizu v Diego F Flores | 6-2,6-7,6-2 |
| UTR Pro Tennis Series Barcelona | 2021/11/09 12:30 | Xavier Gabarro v Sergio Redondo | 2-6,3-5 |