| UTR Pro Tennis Series Barcelona | 2021/11/11 18:30 | Diego F Flores v Sergio Redondo | 6-2,5-1 |
| 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 |
| UTR Pro Tennis Series Barcelona | 2021/11/12 14:30 | Xavier Gabarro v Vlad Cristian Breazu | 4-6,1-3 |
| UTR Pro Tennis Series Barcelona | 2021/11/08 08:00 | David Redondo v Vlad Cristian Breazu | 5-7,4-5 |
| ITF M25 Setubal | 2021/10/04 14:15 | Vlad Cristian Breazu v Gian Luca Tanner | 6-2,1-6,6-10 |
| ITF M25 Setubal | 2021/10/03 14:00 | Luca Teboul v Vlad Cristian Breazu | 4-6,1-6 |
| ITF M15 Curtea de Arges | 2021/08/09 07:00 | Vlad Cristian Breazu v Vlad Andrei Dancu | 2-6,1-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/03 10:30 | Vlad Stoica v Vlad Cristian Breazu | 6-3,6-4 |
| UTR Pro Tennis Series Bucharest | 2021/06/02 15:00 | Bogdan Borza v Vlad Cristian Breazu | 7-6,6-3 |
| UTR Pro Tennis Series Bucharest | 2021/06/02 11:30 | Radu Mihai Papoe v Vlad Cristian Breazu | 7-6,6-0 |