| ITF M25 Reus | 04/01 09:00 | 62 | Albert Pedrico Kravtsov v Mario Mansilla Diez | 6-4,6-1 | |
| ITF M25 Tarragona | 03/24 11:30 | 62 | Mario Mansilla Diez v Pol Amoros Ramos | 5-7,6-3,9-11 | |
| ITF M15 Telde | 04/10 09:00 | 19 | Mario Mansilla Diez v Vicente O Moratalla | 4-6,1-6 | |
| ITF M25 Reus | 04/04 08:00 | 19 | Diego A B Sanchez v Mario Mansilla Diez | 7-6,6-3 | |
| ITF M25 Reus | 04/03 08:00 | 62 | Darius Florin Pop v Mario Mansilla Diez | 4-6,3-6 | |
| ITF M25 Reus | 04/02 12:00 | 62 | Manuel Almeida v Mario Mansilla Diez | 0-6,4-6 | |
| ITF M25 Vila Real de Santo Antonio | 02/13 09:30 | 44 | Javier Molino v Mario Mansilla Diez | 5-7,7-6,10-7 | |
| ITF M25 Vila Real de Santo Antonio | 02/08 14:30 | 25 | Mario Mansilla Diez v Noah Gabriel | 6-2,6-7,4-6 | |
| ITF M25 Vila Real de Santo Antonio | 02/07 10:00 | 44 | Mario Mansilla Diez v Jan Jermar | 6-0,6-2 | |
| ITF M15 Madrid | 11/30 11:45 | 25 | Federico Bondioli v Mario Mansilla Diez | 6-1,6-3 | |
| Challenger Valencia | 11/20 09:00 | 14 | [445] Mario Mansilla Diez v Gian Marco Moroni [364] | 3-6,1-6 | |
| ITF M15 Benicarlo | 11/06 10:30 | 62 | Mario Mansilla Diez v David Naharro | 6-7,7-5,3-10 | |
| ITF M25 Girona | 10/17 08:00 | 62 | Mario Mansilla Diez v Cian Maguire | 6-7,6-2,7-10 | |
| ITF M25 Girona | 10/16 12:00 | 62 | Mario Mansilla Diez v Nicola Rispoli | 6-3,6-0 | |
| ITF M25 Saragozza | 10/06 12:10 | 26 | [445] Mario Mansilla Diez v Louis Wessels [276] | 6-7,0-6 | |
| ITF M25 Saragozza | 10/05 13:25 | 25 | Mario G Fernandez v Mario Mansilla Diez | 2-6,7-6,1-6 | |
| ITF M25 Saragozza | 10/03 13:45 | 54 | Mario Mansilla Diez v Lamine Ouahab | 6-1,0-6,10-8 | |
| ITF M25 Saragozza | 10/02 12:00 | 54 | Mario Mansilla Diez v Areg Stepanian | 6-1,6-0 | |
| ITF M15 Sabadell | 09/28 10:10 | 25 | [486] Eric Vanshelboim v Mario Mansilla Diez [442] | 6-4,6-1 | |
| ITF M15 Casablanca | 09/15 08:55 | 26 | [242] David Pichler v Mario Mansilla Diez [470] | 6-1,6-3 | |
| ITF M15 Casablanca | 09/14 09:00 | 25 | Mario Mansilla Diez v Vladislav Ivanov | 7-6,6-3 | |
| ITF M15 Casablanca | 09/08 11:50 | 26 | Max Houkes v Mario Mansilla Diez | 7-6,6-2 | |
| ITF M15 Casablanca | 09/07 13:55 | 25 | Mario Mansilla Diez v Federico Campana | 7-5,6-2 | |
| ITF M25 Oviedo | 08/30 11:05 | 25 | Mario M Diez v Diego A B Sanchez | 2-6,4-6 | |
| ITF M25 Santander | 08/24 12:15 | 26 | Max Alcala Gurri v Mario Mansilla Diez | 6-1,6-4 | |
| ITF M25 Santander | 08/23 13:40 | 25 | Mario Mansilla Diez v Alexandros Skorilas | 6-1,6-7,7-6 | |
| ITF M25 Santander | 08/23 08:00 | 25 | Mario Mansilla Diez v Joao Lucas Reis da Silva | Cancelled | |
| ITF M15 Xativa | 08/03 07:00 | 25 | Mario Mansilla Diez v Diego A B Sanchez | 6-2,6-7,2-6 | |
| ITF M25 Denia | 07/26 14:00 | 25 | Calvin Hemery v Mario Mansilla Diez | 6-0,6-2 | |
| ITF M25 Gandia | 07/20 12:55 | 25 | Mario Mansilla Diez v Lucas Bouquet | 3-6,2-6 |