Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF W15 Monastir | 2021/05/22 08:30 | Olga Helmi v Nadine Keller | 6-2,6-2 |
| ITF W25 Lisbon | 2021/07/08 10:00 | Yvonne Cavalle-Reimers v Olga Helmi | 7-6,4-6,6-2 |
| ITF W25 Lisbon | 2021/07/06 08:30 | Olga Helmi v Na-Lae Han | 6-4,7-6 |
| ITF W25 Lisbon | 2021/07/05 08:30 | Olga Helmi v Ines Oliveira | 6-1,6-1 |
| ITF W25 Lisbon | 2021/07/04 08:30 | Olga Helmi v Sashi Kempster | 6-0,6-0 |
| ITF W25 Porto | 2021/06/25 09:30 | Arianne Hartono v Olga Helmi | 6-0,4-6,6-2 |
| ITF W25 Porto | 2021/06/24 12:35 | Olga Helmi v Yuriko Lily Miyazaki | 6-4,6-3 |
| ITF W25 Porto | 2021/06/23 09:30 | Olga Helmi v Risa Ushijima | 6-0,6-1 |
| ITF W25 Porto | 2021/06/22 10:25 | Melanie Stokke v Olga Helmi | 3-6,1-6 |
| ITF W15 Monastir | 2021/07/27 09:00 | Nadine Keller v Jimar G G Gonzalez | 6-0,6-4 |
| ITF W15 Monastir | 2021/07/26 11:30 | Nadine Keller v Smriti Bhasin | 6-2,6-1 |
| ITF W15 Monastir | 2021/07/22 10:40 | Nadine Keller v Eliessa Vanlangendonck | 0-6,0-6 |
| ITF W15 Monastir | 2021/07/21 08:30 | Nadine Keller v Humera Baharmus | 6-4,6-2 |
| ITF W25 Klosters | 2021/06/23 10:00 | Camilla Rosatello v Nadine Keller | 6-3,6-3 |
| ITF W25 Klosters | 2021/06/22 07:00 | Sandy Marti v Nadine Keller | 5-7,3-6 |
| ITF W25 Klosters | 2021/06/21 08:30 | Arina Gabriela Vasilescu v Nadine Keller | 6-7,4-6 |
| ITF W25 Klosters | 2021/06/20 12:55 | Livia Airoldi v Nadine Keller | 1-6,1-6 |