Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF W15 Monastir | 2021/05/23 08:30 | Ayumi Koshiishi v Olga Helmi | 3-6,2-6 |
| ITF W15 Monastir | 2021/04/27 09:30 | Olga Helmi v Ayumi Koshiishi | 6-4,6-7,6-10 |
| ITF W15 Monastir | 2021/07/28 10:25 | Olga Helmi v Nadine Keller | 7-5,6-3 |
| 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 W15 Monastir | 2021/07/28 09:30 | Ayumi Koshiishi v Lauren Proctor | 6-3,6-2 |
| ITF W15 Monastir | 2021/07/25 08:30 | Dalayna Hewitt v Ayumi Koshiishi | 6-4,6-4 |
| ITF W15 Monastir | 2021/07/24 08:30 | Ayumi Koshiishi v Tiphanie Lemaitre | 6-4,6-3 |
| ITF W15 Monastir | 2021/07/23 10:55 | Ayumi Koshiishi v Eliessa Vanlangendonck | 6-4,6-3 |
| ITF W15 Monastir | 2021/07/22 10:20 | Ayumi Koshiishi v Katarina Kozarov | 6-2,6-1 |
| ITF W15 Monastir | 2021/07/21 08:30 | Ayumi Koshiishi v Giorgia Pinto | 6-0,6-0 |
| ITF W15 Monastir | 2021/07/17 08:25 | Eliessa Vanlangendonck v Ayumi Koshiishi | 6-1,4-6,6-2 |
| ITF W15 Monastir | 2021/07/16 08:30 | Ayumi Koshiishi v Chiraz Bechri | 6-2,6-4 |