Stadium: Court 16 Round: 62 Ground: Clay
| ITF M15 Majadahonda | 2021/05/02 12:00 | Alvaro Blanco Damea v Diego A B Sanchez | 4-6,1-6 |
| ITF M15 LPD Gran Canaria | 2021/04/29 12:30 | Diego A B Sanchez v Alexander Shevchenko | 7-6,1-6,1-6 |
| ITF M15 LPD Gran Canaria | 2021/04/28 13:50 | Francisco Andreu Garcia v Diego A B Sanchez | 6-7,6-7 |
| ITF M25 Reus | 2021/04/13 07:30 | Arthur Fils v Diego A B Sanchez | 7-5,6-7,10-7 |
| ITF M25 Reus | 2021/04/12 07:30 | Diego A B Sanchez v Timo Legout | 6-2,6-4 |
| ITF M25 Reus | 2021/04/11 07:00 | Giovanni Mpetshi Perricard v Diego A B Sanchez | 7-5,5-7,4-10 |
| ITF M15 Antalya | 2021/04/01 07:30 | Diego A B Sanchez v Pablo Llamas Ruiz | 3-6,1-6 |
| ITF M15 Antalya | 2021/03/31 10:40 | Jacopo Berrettini v Diego A B Sanchez | 3-6,1-6 |
| ITF M15 Majadahonda | 2021/05/02 12:00 | Francisco Cabral v Yan Bondarevskiy | 5-7,3-6 |
| ITF M15 LPD Gran Canaria | 2021/04/29 09:00 | Yan Bondarevskiy v Alvaro Lopez San Martin | 5-7,1-6 |
| ITF M15 LPD Gran Canaria | 2021/04/28 08:30 | Kristjan Tamm v Yan Bondarevskiy | 4-6,2-6 |
| ITF M15 Las Palmas | 2021/04/27 08:00 | Yan Bondarevskiy v Valentin Lapalu | 6-4,6-0 |
| ITF M15 Las Palmas | 2021/04/26 12:00 | Yan Bondarevskiy v Allan Deschamps | 6-3,7-5 |
| ITF M25 Reus | 2021/04/14 08:00 | Matteo Martineau v Yan Bondarevskiy | 6-0,7-6 |
| ITF M25 Reus | 2021/04/13 10:00 | Yan Bondarevskiy v Michiel de Krom | 6-3,6-3 |
| ITF M25 Reus | 2021/04/12 07:30 | Yan Bondarevskiy v Ignacio B Alia | 6-2,6-2 |