Stadium: Court 3 Round: 62 Ground: Clay
| ITF M25 Reus | 2021/04/11 07:00 | Imanol L Morillo v Mikel Aranzabal | 6-1,6-1 |
| ITF M25 La Nucia | 2021/03/15 09:30 | Mikel Aranzabal v Francisco Andreu Garcia | 6-2,5-7,2-10 |
| ITF M25 La Nucia | 2021/03/14 12:00 | Henrik Traskin v Mikel Aranzabal | 6-4,6-7,13-15 |
| ITF M15 La Nucia | 2021/03/10 09:30 | Georgii Kravchenko v Mikel Aranzabal | 6-2,6-2 |
| ITF M15 Cairo | 2021/01/25 08:00 | Mikel Aranzabal v Daisuke Sumizawa | 3-6,4-6 |
| ITF M15 Cairo | 2021/01/19 08:00 | Alejo Lorenzo Lingua Lavallen v Mikel Aranzabal | 6-1,6-2 |
| ITF M15 Cairo | 2021/01/18 08:00 | Mikel Aranzabal v Marco Miceli | 6-1,6-2 |
| ITF M15 Cairo | 2021/01/17 11:00 | Zakai Stone v Mikel Aranzabal | 0-6,4-6 |
| ITF M15 Helsinki | 2021/05/31 10:00 | Yannik Steinegger v Peetu Pohjola | 6-2,6-3 |
| ITF M15 Kouvola | 2021/05/25 10:00 | Lorenzo Rottoli v Peetu Pohjola | 7-6,6-2 |