| UTR Pro Tennis Series Barcelona | 2021/08/03 08:30 | Federico Zeballos v Deviatiarov, Marat | 7-6,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/08/02 10:00 | Jay Friend v Federico Zeballos | 1-6,0-6 |
| Segovia, Spain | 2021/07/25 09:00 | Federico Zeballos v Cozbinov, Alexander | 1-6,1-6 |
| Challenger Pozoblanco | 2021/07/23 20:20 | Federico Zeballos v Gregoire Barrere | 4-6,3-6 |
| Challenger Pozoblanco | 2021/07/21 15:00 | Federico Zeballos v Filip Cristian Jianu | 7-6,6-4 |
| Challenger Pozoblanco | 2021/07/20 15:00 | Gojo, Borna v Federico Zeballos | 4-6,6-7 |
| Challenger Pozoblanco | 2021/07/19 15:00 | Matteo Martineau v Federico Zeballos | 6-2,6-3 |
| Challenger Todi | 2021/07/12 13:00 | Matheus P De Almeida v Federico Zeballos | 6-1,6-3 |
| UTR Pro Tennis Series Barcelona | 2021/08/02 10:00 | Carretero, Pablo v Guerrero Melgar, Angel | 7-6,6-3 |
| ITF M15 Castelo Branco | 2021/07/25 08:00 | Afonso Portugal v Guerrero Melgar, Angel | 6-1,3-6,10-6 |
| ITF M15 Marbella | 2021/05/24 11:00 | Molino, Javier v Guerrero Melgar, Angel | 6-4,6-2 |
| Marbella, Spain | 2021/03/28 10:00 | Nikolas Sanchez Izquierdo v Guerrero Melgar, Angel | 6-1,6-0 |
| ITF - M25 Vale Do Lobo | 2021/03/08 13:00 | Alejandro Moro Canas v Guerrero Melgar, Angel | 7-6,3-6,10-4 |
| ITF - M25 Vale Do Lobo | 2021/03/07 12:00 | Paulo Knippling v Guerrero Melgar, Angel | 3-6,2-6 |
| ITF - M25 Faro | 2021/02/28 11:00 | Joncour, Ronan v Guerrero Melgar, Angel | 6-1,6-3 |
| ITF M15 Sintra | 2020/09/13 08:30 | Wang, Tak Khunn v Guerrero Melgar, Angel | 6-0,6-2 |