| ITF - Limassol W25 | 12/02 08:00 | 28 | [296] Sofia Costoulas v Anastasia Zakharova [192] | 7-6,7-5 | |
| ITF - Limassol W25 | 12/01 08:00 | 27 | [296] Sofia Costoulas v Polina Iatcenko [358] | 7-5,7-5 | |
| ITF - Limassol W25 | 11/30 08:00 | 26 | [296] Sofia Costoulas v Hanne Vandewinkel [343] | 7-5,6-1 | |
| ITF - Limassol W25 | 11/29 08:00 | 25 | Sofia Costoulas v Angelina Wirges | 3-6,7-6,6-0 | |
| ITF - Limassol W25 | 11/26 09:00 | 29 | [330] Hanne Vandewinkel v Sofia Costoulas [291] | 6-2,4-6,6-4 | |
| ITF - Limassol W25 | 11/25 08:00 | 28 | [291] Sofia Costoulas v Anastasia Zakharova [192] | 6-2,7-5 | |
| ITF - Limassol W25 | 11/24 12:10 | 27 | Sofia Costoulas v Rebecca Munk Mortensen | 6-3,6-2 | |
| ITF - Limassol W25 | 11/23 08:00 | 26 | [291] Sofia Costoulas v Polina Iatcenko [356] | 6-4,6-0 | |
| ITF - Limassol W25 | 11/22 08:00 | 25 | [291] Sofia Costoulas v Weronika Falkowska [333] | 6-3,6-2 | |
| ITF - Petange W40 | 11/17 16:00 | 27 | [101] Oceane Dodin v Sofia Costoulas [297] | 6-2,7-5 | |
| ITF - Petange W40 | 11/16 08:50 | 26 | Sofia Costoulas v Veronika Podrez | 6-3,3-6,6-1 | |
| ITF - Petange W40 | 11/15 12:55 | 25 | [267] Antonia Ruzic v Sofia Costoulas [297] | 4-6,7-6,1-6 | |
| ITF - Nantes W60 | 10/30 16:05 | 25 | [297] Sofia Costoulas v Natalija Stevanovic [185] | 2-6,7-6,4-6 | |
| ITF - Poitiers W80 | 10/26 12:20 | 26 | [111] Anna-Lena Friedsam v Sofia Costoulas [296] | 6-3,6-2 | |
| ITF - Poitiers W80 | 10/24 08:30 | 25 | Marine Szostak v Sofia Costoulas | 1-6,7-6,2-6 | |
| ITF - Hamburg W60 | 10/17 09:10 | 25 | Alevtina Ibragimova v Sofia Costoulas | 2-6,6-4,6-4 | |
| ITF - Quinta do Lago W40 | 10/11 09:00 | 25 | [131] Olivia Gadecki v Sofia Costoulas [281] | 7-6,6-1 | |
| ITF - Santarem W25 | 09/27 13:15 | 25 | Laura Pigossi v Sofia Costoulas | Cancelled | |
| ITF - Santarem W25 | 09/27 09:00 | 25 | Alina Charaeva v Sofia Costoulas | 6-2,3-6,6-4 | |
| ITF - Ceuta W25 | 09/23 12:05 | 28 | [291] Sofia Costoulas v Aliona Falei [340] | 6-3,4-6,0-6 | |
| ITF - Ceuta W25 | 09/22 09:30 | 27 | Kira Pavlova v Sofia Costoulas | 5-7,3-6 | |
| ITF - Ceuta W25 | 09/21 08:00 | 26 | Anastasiia Grechkina v Sofia Costoulas | 4-6,2-6 | |
| ITF - Ceuta W25 | 09/19 13:30 | 25 | Arlinda Rushiti v Sofia Costoulas | 4-6,6-1,2-6 | |
| ITF - Leiria W25 | 09/14 10:00 | 26 | [288] Sofia Costoulas v Eva Guerrero Alvarez [434] | 4-6,6-3,3-6 | |
| ITF - Leiria W25 | 09/13 13:15 | 25 | Sofia Costoulas v Ranah Akua Stoiber | 6-3,6-0 | |
| ITF - Verbier W25 | 08/23 08:55 | 25 | [299] Sofia Costoulas v Berta Bonardi [419] | 7-5,5-7,3-6 | |
| ITF - Bistrita W25 | 08/18 11:20 | 27 | [299] Sofia Costoulas v Ilinca D Amariei [438] | 6-7,3-6 | |
| ITF - Bistrita W25 | 08/17 13:05 | 26 | Sofia Costoulas v Jessica Pieri | 7-6,6-4 | |
| ITF - Bistrita W25 | 08/15 12:15 | 25 | Sofia Costoulas v Briana Szabo | 6-3,6-1 | |
| ITF - Hechingen W60 | 08/03 12:05 | 26 | [141] Brenda Fruhvirtova v Sofia Costoulas [307] | 6-3,6-2 |
Sofia Costoulas (ur. 2 kwietnia 2005) – belgijska tenisistka.