Stadium: Court 1 Round: 25 Ground: Clay
| ITF M25 Denia | 2021/07/25 08:00 | Denis Klok v Lorenzo Joaquin Rodriguez | 6-7,1-6 |
| ITF M25 Gandia | 2021/07/19 09:00 | Denis Klok v Nacho Serra Sanchez | 6-7,6-0,2-10 |
| ITF M25 Gandia | 2021/07/18 07:00 | Denis Klok v Hans Albert Schubert | 6-3,6-2 |
| ITF M15 Sofia | 2021/07/07 07:00 | Denis Klok v Aleksandr Braynin | 4-6,3-6 |
| ITF M25 Belgrade | 2021/06/27 07:00 | Denis Klok v George Botezan | 3-6,1-6 |
| ITF M15 Antalya | 2021/04/28 11:40 | Francesco Maestrelli v Denis Klok | 1-6,6-2,6-1 |
| ITF M15 Antalya | 2021/04/27 07:00 | Denis Klok v Vladimir Korolev | 6-1,4-6,10-3 |
| ITF M15 Antalya | 2021/04/26 07:00 | Denis Klok v Vojtech Mares | 6-3,6-2 |
| ITF M25 Santander | 2021/08/27 14:30 | Juan Bautista Torres v Carlos Sanchez Jover | 4-6,6-3,6-3 |
| ITF M25 Santander | 2021/08/26 12:45 | Miguel Damas v Carlos Sanchez Jover | 6-3,1-6,2-6 |
| ITF M15 Xativa | 2021/08/06 15:00 | Francesco Passaro v Carlos Sanchez Jover | 6-4,0-6,6-2 |
| ITF M15 Xativa | 2021/08/05 17:10 | Jack Pinnington Jones v Carlos Sanchez Jover | 2-6,1-6 |
| ITF M25 Denia | 2021/07/29 18:10 | Javier Barranco Cosano v Carlos Sanchez Jover | 6-2,6-2 |
| ITF M25 Denia | 2021/07/28 10:05 | Carlos Sanchez Jover v Oleg Prihodko | 7-5,7-5 |
| ITF M25 Gandia | 2021/07/23 10:45 | Carlos Sanchez Jover v Antoine Escoffier | 2-6,6-2,5-7 |
| ITF M25 Gandia | 2021/07/22 08:00 | Carlos Sanchez Jover v Alex M Pujolras | 6-4,6-3 |