Stadium: Court 2 CTA Round: 26 Ground: Hardcourt outdoor
| ITF - W15 Amarante | 2021/07/21 12:45 | Mafalda Guedes v Carolina Azadinho | 6-1,6-1 |
| ITF - W25 Porto | 2021/06/20 16:30 | Leire De Ezcurra v Mafalda Guedes | 2-6,6-4,10-6 |
| ITF - W25 Figueira Da Foz | 2021/06/13 09:30 | Freya Christie v Mafalda Guedes | 6-0,6-1 |
| ITF - W25 Oeiras | 2021/04/25 14:00 | Maria G Carrasco v Mafalda Guedes | 6-1,6-1 |
| ITF - W25 Oeiras | 2021/04/18 09:00 | Mafalda Guedes v Olga Parres Azcoitia | 3-6,3-6 |
| ITF - W60 Oeiras | 2021/04/11 11:00 | Mafalda Guedes v Suzan Lamens | 1-6,0-6 |
| FPT Portugal Series - Feminin | 2020/07/08 08:00 | Mafalda Guedes v Alexandra Silva | 6-1,6-0 |
| FPT Portugal Series - Feminin | 2020/06/30 15:30 | Elizabet Hamaliy v Mafalda Guedes | 6-4,6-2 |
| ITF - W15 Amarante | 2021/07/20 11:00 | Fiona Codino v Mei Yamaguchi | 4-6,2-6 |
| ITF - W15 Almada | 2021/07/16 08:30 | Alexa Graham v Mei Yamaguchi | 7-6,7-6 |
| ITF - W15 Almada | 2021/07/15 10:10 | Leonor Oliveira v Mei Yamaguchi | 7-5,2-6,0-6 |
| ITF - W15 Almada | 2021/07/13 08:30 | Oceane Babel v Mei Yamaguchi | 3-6,2-6 |
| ITF - W25 Lisabona | 2021/07/06 14:45 | Mei Yamaguchi v Lulu Sun | 7-6,3-6,1-6 |
| ITF - W25 Lisabona | 2021/07/05 08:30 | Mei Yamaguchi v Julita Saner | 6-1,6-0 |
| ITF - W25 Lisabona | 2021/07/04 11:00 | Mei Yamaguchi v Milla Sequeira | 6-0,6-2 |
| ITF - W25 Haga | 2021/06/28 08:00 | Joanna Garland v Mei Yamaguchi | 6-0,6-2 |