| UTR Pro Tennis Series Barcellona | 2021/08/05 10:00 | Marat Deviatiarov v Pablo Carretero | 6-0,6-1 |
| UTR Pro Tennis Series Barcellona | 2021/08/04 07:00 | Jay Friend v Marat Deviatiarov | 7-5,4-6,3-5 |
| UTR Pro Tennis Series Barcellona | 2021/08/03 08:30 | Federico Zeballos v Marat Deviatiarov | 7-6,6-4 |
| ITF M15 Novomoskovsk | 2021/06/03 16:55 | Aliaksandr Liaonenka v Marat Deviatiarov | 1-6,4-6 |
| ITF M15 Novomoskovsk | 2021/05/26 08:20 | Oleksandr Ovcharenko v Marat Deviatiarov | 7-6,6-4 |
| ITF M15 Tbilisi | 2021/05/18 07:00 | Marat Deviatiarov v Marek Gengel | 1-6,4-6 |
| ITF M15 Gerusalemme | 2021/05/13 07:00 | Justin Roberts v Marat Deviatiarov | 6-1,6-2 |
| ITF M15 Gerusalemme | 2021/05/12 07:00 | Alec Beckley v Marat Deviatiarov | 1-6,6-7 |
| UTR Pro Tennis Series Barcellona | 2021/08/05 10:00 | Jay Friend v Angel G Melgar | 7-5,5-1 |
| UTR Pro Tennis Series Barcellona | 2021/08/04 07:00 | Federico Zeballos v Angel G Melgar | 6-4,6-4 |
| UTR Pro Tennis Series Barcellona | 2021/08/02 10:00 | Pablo Carretero v Angel G Melgar | 7-6,6-3 |
| ITF M15 Castelo Branco | 2021/07/25 08:00 | Afonso Portugal v Angel G Melgar | 6-1,3-6,10-6 |
| ITF M15 Marbella | 2021/05/24 11:00 | Javier Molino v Angel G Melgar | 6-4,6-2 |
| Challenger Marbella | 2021/03/28 10:00 | Nikolas Sanchez Izquierdo v Angel G Melgar | 6-1,6-0 |
| ITF M25 Vale Do Lobo | 2021/03/08 13:00 | Alejandro Moro Canas v Angel G Melgar | 7-6,3-6,10-4 |
| ITF M25 Vale Do Lobo | 2021/03/07 12:00 | Paulo Knippling v Angel G Melgar | 3-6,2-6 |