Stadium: Court 1 Round: 54 Ground: Hardcourt outdoor
| ITF W25 Santarem | 2021/09/20 11:00 | Mei Yamaguchi v Madalena Amil | 6-3,6-1 |
| ITF W25 Radom | 2021/08/11 08:00 | Mei Yamaguchi v Nagi Hanatani | 2-6,2-6 |
| ITF W25 Radom | 2021/08/09 15:20 | Mei Yamaguchi v Aneta Laboutkova | 6-4,2-6,10-6 |
| ITF W25 Radom | 2021/08/09 10:30 | Mei Yamaguchi v Freya Christie | 7-6,6-7,10-7 |
| ITF W25 Bydhošť | 2021/08/04 12:50 | Mei Yamaguchi v Iryna Shymanovich | 5-7,0-6 |
| ITF W25 Bydhošť | 2021/08/03 10:20 | Mei Yamaguchi v Sapfo Sakellaridi | 6-0,1-6,11-9 |
| ITF W25 Bydhošť | 2021/08/02 11:30 | Mei Yamaguchi v Witoria Rutkowska | 5-7,6-1,10-5 |
| ITF W15 Amarante | 2021/07/25 09:00 | Federica Rossi v Mei Yamaguchi | 4-6,6-3,4-6 |
| ITF W60 Caldas da Rainha | 2021/09/12 10:30 | Olga Parres Azcoitia v Angelica Moratelli | 4-6,2-6 |
| ITF W15 Don Benito | 2021/07/24 16:30 | Angelina Wirges v Olga Parres Azcoitia | 6-2,3-6,4-6 |
| ITF W15 Don Benito | 2021/07/23 08:00 | Maria Dolores Lopez Martinez v Olga Parres Azcoitia | 2-6,3-6 |
| ITF W15 Don Benito | 2021/07/22 09:50 | Tamira Paszek v Olga Parres Azcoitia | 6-2,6-7,4-6 |
| ITF W15 Don Benito | 2021/07/21 07:00 | Tamara Kostic v Olga Parres Azcoitia | 7-5,0-6,4-6 |
| ITF W15 Don Benito | 2021/07/20 06:55 | Lidia Moreno Arias v Olga Parres Azcoitia | 1-6,6-7 |
| ITF W15 Almada | 2021/07/14 08:30 | Olga Parres Azcoitia v Isabel A Gallego | 6-2,2-6,4-6 |
| ITF W25 Palma del Rio | 2021/07/01 17:30 | Olga Parres Azcoitia v Marina Bassols Ribera | 1-6,6-7 |