| ITF M25 Sintra | 2021/09/07 08:30 | Diego F Flores v Daniel Little | 6-4,0-6,6-10 |
| ITF M25 Sintra | 2021/09/06 10:05 | Diego F Flores v Alan Gleeson | 6-3,6-3 |
| ITF M15 Bratislava | 2021/08/24 10:00 | Vasil Kirkov v Diego F Flores | 6-3,6-3 |
| ITF M15 Bratislava | 2021/08/19 08:00 | Diego F Flores v Mate Valkusz | 2-6,6-2,5-7 |
| ITF M15 Bratislava | 2021/08/18 10:05 | Diego F Flores v Lukas Pokorny | 6-4,2-6,6-4 |
| ITF M15 Xativa | 2021/08/04 07:00 | Diego F Flores v Inaki Montes-De La Torre | 3-6,2-6 |
| ITF M25 Idanha-A-Nova | 2021/07/19 13:00 | Diego F Flores v Mario G Fernandez | 6-2,3-6,5-10 |
| ITF M25 Idanha-A-Nova | 2021/07/18 13:00 | Diego F Flores v Michel-Alexandre Fortin | 6-1,6-0 |