Stadium: Court 1 Round: 25 Ground: Clay
| ITF M25 Santander | 2021/08/23 09:00 | Alejandro Mendoza v Samuel M Arjona | 6-4,3-6,9-11 |
| ITF M25 Santander | 2021/08/22 09:00 | Samuel M Arjona v Patrick Foley | 6-4,7-6 |
| ITF M15 Xativa | 2021/08/01 13:00 | Inaki Montes-De La Torre v Samuel M Arjona | 6-2,6-2 |
| ITF M25 Denia | 2021/07/25 08:00 | Vicente O Moratalla v Samuel M Arjona | 6-0,6-0 |
| ITF M25 Gandia | 2021/07/20 14:30 | Daniel Merida Aguilar v Samuel M Arjona | 6-3,6-1 |
| ITF M15 Sarajevo | 2021/05/30 12:00 | Samuel M Arjona v Nemanja Malesevic | 3-6,3-6 |
| ITF M25 Kiseljak | 2021/05/23 10:45 | Bozo Barun v Samuel M Arjona | 6-3,6-2 |
| ITF M15 Brcko | 2021/05/16 12:30 | Samuel M Arjona v Dusan Milanovic | 7-6,4-6,1-10 |
| ITF M25 Santander | 2021/08/23 09:00 | Miguel Damas v Mario Mansilla Diez | 6-2,6-3 |
| ITF M25 Santander | 2021/08/22 09:00 | Miguel Damas v Victor Bini | 6-1,3-6,10-7 |
| ITF M15 Xativa | 2021/08/05 16:30 | Carlos Lopez Montagud v Miguel Damas | 6-4,6-2 |
| ITF M15 Xativa | 2021/08/04 14:55 | Miguel Damas v Daniel Merida Aguilar | 4-6,6-3,7-5 |
| ITF M15 Castelo Branco | 2021/07/27 14:05 | Miguel Damas v Duarte Vale | 6-7,3-6 |
| ITF M25 Idanha-A-Nova | 2021/07/13 07:55 | Miguel Damas v Daniel Little | 3-6,7-6,7-10 |
| ITF M25 Idanha-A-Nova | 2021/07/12 13:25 | Miguel Damas v Ben Jones | 7-5,6-3 |
| ITF M25 Idanha-A-Nova | 2021/07/11 10:30 | Miguel Damas v Mario G Fernandez | 4-6,7-6,10-7 |