| ITF W35 Bastad | 05/09 08:10 | 26 | [457] 페테카우, 이리나 v Costoulas, Sofia [291] | Retired | |
| ITF W35 Bastad | 05/07 11:25 | 25 | 누디, 마이린 v Costoulas, Sofia | 2-6,6-7 | |
| Billie Jean King Cup 2022, Finals | 04/13 19:05 | 64 | 나바로, 에마 v Costoulas, Sofia | Cancelled | |
| Billie Jean King Cup 2022, Finals | 04/12 22:00 | 64 | [5] 페굴라, 제시카 v Costoulas, Sofia [279] | 4-6,6-2,6-3 | |
| ITF W50 Kashiwa | 04/05 03:15 | 27 | [356] 이, 야수안 v Costoulas, Sofia [285] | 6-1,6-2 | |
| ITF W50 Kashiwa | 04/04 03:30 | 26 | [285] Costoulas, Sofia v 혼, 프리스실라 [189] | 6-2,6-2 | |
| ITF W50 Kashiwa | 04/02 03:40 | 25 | [285] Costoulas, Sofia v 박, 소현 [299] | 6-2,6-2 | |
| ITF W50 Kofu | 03/28 03:10 | 26 | [286] Costoulas, Sofia v 아이아바, 데스타니 [196] | 3-6,4-6 | |
| ITF W50 Kofu | 03/27 04:00 | 25 | Costoulas, Sofia v Rin Nakagawara | 6-1,6-2 | |
| ITF W15 Hinode | 03/23 01:00 | 28 | Costoulas, Sofia v 마나스, 마에간 | 2-6,3-6 | |
| ITF W15 Hinode | 03/22 00:55 | 27 | Costoulas, Sofia v 김, 다빈 | 3-6,6-3,6-0 | |
| ITF W15 Hinode | 03/21 04:20 | 26 | Costoulas, Sofia v Yoshioka, Kisa | 6-0,6-3 | |
| ITF W15 Hinode | 03/20 05:00 | 25 | Costoulas, Sofia v 치카라이시, 유이 | 6-0,6-2 | |
| ITF W35 Santo Domingo | 03/13 13:25 | 25 | [279] Costoulas, Sofia v 헤라조 곤잘레즈, 마리아 페르난다 [205] | 6-0,3-6,3-6 | |
| ITF W35 Santo Domingo | 03/08 15:15 | 27 | [226] 칼리에바, 엘비나 v Costoulas, Sofia [279] | 6-7,6-4,6-0 | |
| ITF W35 Santo Domingo | 03/07 16:15 | 26 | [278] 레프첸코, 발바라 v Costoulas, Sofia [279] | 6-7,4-6 | |
| ITF W35 Santo Domingo | 03/06 15:05 | 25 | [471] Popa, Maria Sara v Costoulas, Sofia [279] | 2-6,5-7 | |
| ITF W50 Pretoria | 02/27 10:05 | 25 | [296] Daniel, Jaeda v Costoulas, Sofia [274] | 7-5,6-2 | |
| ITF W50 Pretoria | 02/20 13:00 | 25 | [377] 맥피, 카일라흐 v Costoulas, Sofia [274] | 6-3,6-2 | |
| ITF W50 Roehampton | 02/15 13:35 | 26 | [278] Bartunkova, Nikola v Costoulas, Sofia [276] | 6-3,6-1 | |
| ITF W50 Roehampton | 02/14 09:55 | 25 | [493] Johanne C Svendsen v Costoulas, Sofia [276] | 4-6,3-6 | |
| ITF W75 Rome (GA) | 01/31 18:20 | 25 | [258] Costoulas, Sofia v 스트라코바, 발레리야 [242] | 3-6,7-5,4-6 | |
| ITF W75 Vero Beach | 01/23 20:05 | 25 | [248] Costoulas, Sofia v 비케리, 사치아 [137] | 6-2,3-6,2-6 | |
| ITF W35 Naples | 01/18 14:50 | 26 | [248] Costoulas, Sofia v 월프, 비비안 [399] | 6-4,3-6,1-6 | |
| ITF W35 Naples | 01/17 17:10 | 25 | [248] Costoulas, Sofia v Victoria Osuigwe [441] | 3-6,6-2,6-2 | |
| ITF W25 Limassol | 12/03 09:00 | 29 | [255] 암브로시오, 실비아 v Costoulas, Sofia [296] | 1-6,3-6 | |
| ITF W25 Limassol | 12/02 08:00 | 28 | [296] Costoulas, Sofia v 자카로바, 아나스타시아 [192] | 7-6,7-5 | |
| ITF W25 Limassol | 12/01 08:00 | 27 | [296] Costoulas, Sofia v Polina Iatcenko [358] | 7-5,7-5 | |
| ITF W25 Limassol | 11/30 08:00 | 26 | [296] Costoulas, Sofia v Hanne Vandewinkel [343] | 7-5,6-1 | |
| ITF W25 Limassol | 11/29 08:00 | 25 | Costoulas, Sofia v 윌게스, 안젤리나 | 3-6,7-6,6-0 |
Sofia Costoulas (born 2 April 2005) is a Belgian tennis player.
Costoulas has a Greek–Congolese father and a Belgian mother.
Costoulas has a career-high singles ranking by the Women's Tennis Association (WTA) of 248 and a best doubles ranking of 229.
On the ITF Junior Circuit, she had a career-high combined ranking of No. 2, achieved on 18 April 2022. She lost the girls' singles final of the 2022 Australian Open to Petra Marčinko. She had already reached the Wimbledon junior doubles final in 2021.