Stadium: Court 3 Round: 26 Ground: Clay
| ITF W15 Bad Waltersdorf | 2021/08/25 09:30 | Sapfo Sakellaridi v Nikol Palecek | 6-1,6-0 |
| ITF W15 Warmbad-Villach | 2021/08/17 10:30 | Sapfo Sakellaridi v Fiona Ganz | 4-6,6-3,3-6 |
| ITF W25 Radom | 2021/08/09 09:40 | Carlota Martinez Cirez v Sapfo Sakellaridi | 6-3,7-5 |
| ITF W25 Radom | 2021/08/08 08:00 | Ingrid Vojcinakova v Sapfo Sakellaridi | 7-6,5-7,4-10 |
| ITF W25 Bydgoszcz | 2021/08/03 10:20 | Mei Yamaguchi v Sapfo Sakellaridi | 6-0,1-6,11-9 |
| ITF W25 Bydgoszcz | 2021/08/02 11:30 | Alicja Formella v Sapfo Sakellaridi | 1-6,3-6 |
| ITF W60 Grodzisk Mazowiecki | 2021/07/26 09:20 | Sapfo Sakellaridi v Olyanovskaya, Valeriya | 2-6,1-6 |
| ITF W60 Grodzisk Mazowiecki | 2021/07/25 10:05 | Victoria Chramcova v Sapfo Sakellaridi | 2-6,1-6 |
| ITF W15 Bad Waltersdorf | 2021/08/24 09:50 | Mavie Osterreicher v Elena Karner | 6-7,6-4,6-4 |
| ITF W15 Warmbad-Villach | 2021/08/19 10:25 | Mavie Osterreicher v Yeon Woo Ku | 2-6,3-6 |
| ITF W15 Warmbad-Villach | 2021/08/17 14:30 | Mavie Osterreicher v Jasmin Jebawy | 6-3,6-3 |
| WTA - Linz | 2018/10/07 08:00 | Mavie Osterreicher v Minella, Mandy | 3-6,1-6 |
| ITF Women Hammamet | 2018/01/30 11:00 | Mavie Osterreicher v Kennel, Karin | 3-6,1-6 |
| ITF Women Hammamet | 2018/01/28 09:00 | Mavie Osterreicher v Nanti, Mariagiovanna | 6-0,6-3 |