stadio: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF W15 Monastir | 2021/12/14 09:00 | Sinja Kraus v Sofia Costoulas | 0-6,2-6 |
| ITF W15 Wanfercee-Baulet | 2021/08/25 15:25 | Sofia Costoulas v Carlota Martinez Cirez | 3-6,2-6 |
| ITF W15 Erwitte | 2021/08/17 11:00 | Sofia Costoulas v Carolina Kuhl | 6-0,4-6,4-6 |
| ITF W25 Koksijde | 2021/08/10 13:40 | Angela Fita Boluda v Sofia Costoulas | 6-3,6-2 |
| ITF W25 Denain | 2021/06/16 08:00 | Dalila Spiteri v Sofia Costoulas | 6-2,6-1 |
| ITF W15 Antalya | 2021/03/17 13:10 | Polina Leykina v Sofia Costoulas | 4-6,6-3,6-3 |
| ITF W15 Antalya | 2021/03/10 07:00 | Johana Markova v Sofia Costoulas | 6-2,0-6,6-4 |
| ITF W15 Antalya | 2021/03/04 09:10 | Sofia Costoulas v Nuria Brancaccio | 0-6,2-6 |
| ITF W15 Monastir | 2021/12/14 10:25 | Diana Chehoudi v Hanne Vandewinkel | 6-4,3-6,3-6 |
| ITF W15 Monastir | 2021/12/07 10:05 | Akvile Parazinskaite v Hanne Vandewinkel | 7-5,7-5 |