Stadium: Court 2 Round: 54 Ground: Hardcourt outdoor
| ITF W25 Fort Worth | 2021/09/20 14:00 | Chanelle Van Nguyen v Erica Oosterhout | 6-4,6-3 |
| ITF W60 San Bartolome De Tirajana | 2021/08/16 08:30 | Sohyun Park v Erica Oosterhout | 7-6,6-1 |
| ITF W60 San Bartolome De Tirajana Qual | 2021/08/15 10:20 | Erica Oosterhout v Valeria Koussenkova | 6-1,6-1 |
| ITF W60 San Bartolome De Tirajana | 2021/08/08 10:00 | Erica Oosterhout v Dia Evtimova | 6-3,3-6,10-12 |
| ITF W25 Bydgoszcz | 2021/08/01 08:00 | Laura Radakovic v Erica Oosterhout | 0-6,6-3,10-5 |
| ITF W60 Grodzisk Mazowiecki | 2021/07/26 09:00 | Maria Lourdes Carle v Erica Oosterhout | 6-4,6-2 |
| ITF W60 Grodzisk Mazowiecki | 2021/07/25 08:00 | Erica Oosterhout v Iveta Dapkute | 6-2,7-6 |
| ITF W15 Don Benito | 2021/07/22 07:30 | Angelina Wirges v Erica Oosterhout | 6-3,6-4 |
| ITF W15 Cancun | 2021/09/19 17:00 | Elena Ecker v Gala Arangio | 0-6,0-6 |
| ITF W15 Monastir | 2021/09/13 10:30 | Elena Ecker v Ginevra Peiretti | 0-6,2-6 |
| ITF W15 Monastir | 2021/09/06 08:00 | Elena Ecker v Marija Semenistaja | 0-6,0-6 |
| ITF W25 Santo Domingo | 2021/06/06 14:00 | Michaela Kadleckova v Elena Ecker | 6-0,6-0 |