Stadium: Court 12 Round: 26 Ground: Clay
| ITF M25 Gandia | 2021/07/21 07:30 | Imanol L Morillo v Mariano Kestelboim | 7-5,3-6,4-6 |
| ITF M15 Poprad | 2021/07/06 09:35 | Mariano Kestelboim v Marco Miceli | 6-1,3-6,2-6 |
| ITF - M15 Antalya | 2021/07/02 06:20 | Francisco Comesana v Mariano Kestelboim | 6-2,6-1 |
| ITF - M15 Antalya | 2021/07/01 06:30 | Ignacio Carou v Mariano Kestelboim | 3-6,5-7 |
| ITF - M15 Antalya | 2021/06/29 08:25 | Andrey Chepelev v Mariano Kestelboim | 6-7,7-5,1-6 |
| ITF - M15 Antalya | 2021/06/26 07:00 | Mariano Kestelboim v Facundo Juarez | 1-6,4-6 |
| ITF - M15 Antalya | 2021/06/25 06:50 | Mariano Kestelboim v Ignacio Carou | 7-6,6-3 |
| ITF - M15 Antalya | 2021/06/24 07:00 | Yu Hsiou Hsu v Mariano Kestelboim | 4-6,2-6 |
| ITF M25 Gandia | 2021/07/21 16:00 | Mas de Ugarte, Jordi v Jahn, Jeremy | 6-4,6-3 |
| ITF M25 Gandia | 2021/07/20 08:00 | Roglan, Albert v Mas de Ugarte, Jordi | 1-6,1-6 |
| ITF M25 Gandia | 2021/07/18 08:00 | Mas de Ugarte, Jordi v Trapeznikov, Zakhar | 6-3,6-2 |
| ITF M25 Bakio | 2021/06/29 10:50 | Martinez, Alex v Mas de Ugarte, Jordi | 7-6,6-4 |
| ITF M25 Bakio | 2021/06/28 16:00 | Cabrera Bello, Inaki v Mas de Ugarte, Jordi | 3-6,2-6 |
| UTR Pro Tennis Series Barcelona | 2021/06/24 10:00 | Mas de Ugarte, Jordi v Joris De Loore | 4-6,2-5 |
| UTR Pro Tennis Series Barcelona | 2021/06/22 08:00 | Mas de Ugarte, Jordi v Pla Malfeito, Jaume | 3-6,6-2,6-4 |
| UTR Pro Tennis Series Barcelona | 2021/06/21 12:30 | Mas de Ugarte, Jordi v Echevarri, Jesus | 6-3,5-0 |