Stadium: Court 3 Round: 28 Ground: Hardcourt outdoor
| ITF - W15 Sharm El Sheikh | 2021/10/08 10:15 | Xin Tong Wang v Eri Shimizu | 0-6,0-6 |
| ITF - W15 Sharm El Sheikh | 2021/10/07 11:30 | Zhuoxuan Bai v Eri Shimizu | 7-5,3-6,4-6 |
| ITF - W15 Sharm El Sheikh | 2021/10/06 13:45 | Yujiao Che v Eri Shimizu | 4-6,4-6 |
| ITF W25 Vienna | 2021/08/30 10:55 | Sapfo Sakellaridi v Eri Shimizu | 7-6,6-2 |
| ITF W25 Vienna | 2021/08/29 14:00 | Mila Masic v Eri Shimizu | 1-6,7-5,5-10 |
| ITF W15 Bad Waltersdorf | 2021/08/24 11:45 | Eri Shimizu v Yeon Woo Ku | 4-6,6-2,4-6 |
| ITF W15 Warmbad-Villach | 2021/08/19 12:10 | Eri Shimizu v Anna Turati | 2-6,5-7 |
| ITF W15 Warmbad-Villach | 2021/08/17 12:55 | Eri Shimizu v Pulchartova, Laetitia | 6-4,6-2 |
| ITF - W15 Sharm El Sheikh | 2021/10/08 08:00 | Tamara Kostic v Ruppert, Lena | 6-3,4-6,0-6 |
| ITF - W15 Sharm El Sheikh | 2021/10/07 08:00 | Ruppert, Lena v Punnin Kovapitukted | 7-5,6-4 |
| ITF - W15 Sharm El Sheikh | 2021/10/06 13:40 | Ashmitha Easwaramurthi v Ruppert, Lena | 1-6,0-6 |
| ITF W15 Wanfercee-Baulet | 2021/08/23 10:40 | Ruppert, Lena v Chloe Noel | 3-6,4-6 |
| ITF W15 Erwitte | 2021/08/16 09:00 | Ruppert, Lena v Paula Rumpf | 4-6,7-5,7-10 |
| ITF W15 Frederiksberg | 2021/08/07 09:00 | Ruppert, Lena v Nicole Khirin | 7-5,4-6,4-6 |
| ITF W15 Frederiksberg | 2021/08/06 08:50 | Samavati, Sofia Nami v Ruppert, Lena | 3-6,6-3,4-6 |
| ITF W15 Frederiksberg | 2021/08/05 07:55 | Ruppert, Lena v Pulchartova, Laetitia | 6-3,6-7,7-6 |