Stadium: Court 2 Round: 26
| ITF M15 Platja D'Aro | 2021/10/05 10:45 | Alexander Weis v Daniel Merida Aguilar | 4-6,3-6 |
| Challenger Murcia | 2021/09/26 09:00 | Emilio Nava v Daniel Merida Aguilar | 6-3,6-2 |
| ITF M15 Melilla | 2021/09/24 09:00 | Daniel Merida Aguilar v Oscar Mesquida Berg | 7-5,3-6,3-6 |
| ITF M25 Santander | 2021/08/24 09:00 | Rio Noguchi v Daniel Merida Aguilar | 6-0,6-2 |
| ITF M15 Xativa | 2021/08/04 14:55 | Miguel Damas v Daniel Merida Aguilar | 4-6,6-3,7-5 |
| ITF M25 Gandia | 2021/07/23 09:40 | Javier Barranco Cosano v Daniel Merida Aguilar | 6-1,6-3 |
| ITF M25 Gandia | 2021/07/22 16:00 | Daniel Merida Aguilar v Carlos Lopez Montagud | 6-4,6-1 |
| ITF M25 Gandia | 2021/07/20 14:30 | Daniel Merida Aguilar v Samuel M Arjona | 6-3,6-1 |
| ITF M15 Platja D'Aro | 2021/10/06 08:25 | Guy Den Heijer v Alexis Musialek | 5-7,6-4,6-1 |
| UTR Pro Tennis Series Mulheim | 2021/09/25 13:30 | Colin Sinclair v Guy Den Heijer | 2-6,3-5 |
| UTR Pro Tennis Series Mulheim | 2021/09/25 08:30 | Mikhail Minakov v Guy Den Heijer | 3-6,6-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/24 11:00 | Thijmen Loof v Guy Den Heijer | 3-6,2-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/23 08:00 | Jose A R Rodriguez v Guy Den Heijer | 6-7,2-5 |
| UTR Pro Tennis Series Mulheim | 2021/09/21 13:00 | Buvaysar Gadamauri v Guy Den Heijer | 6-4,6-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/20 12:30 | Guy Den Heijer v Lawrence Bataljin | 6-0,5-1 |
| ITF M25 Eupen | 2021/09/09 09:00 | Romain Faucon v Guy Den Heijer | 6-4,6-4 |