| ITF W25比勒陀利亚 | 03/09 09:40 | 26 | [366] Alice Tubello v Sofia Costoulas [347] | 2-6,2-6 | |
| ITF W25比勒陀利亚 | 03/08 09:50 | 25 | [347] Sofia Costoulas v 赛琳娜•贾尼西耶维奇 [210] | 7-6,7-5 | |
| ITF W25圣多明各 | 02/24 14:00 | 27 | [417] 斯泰西•冯 v Sofia Costoulas [361] | 2-6,7-6,6-4 | |
| ITF W25圣多明各 | 02/23 16:35 | 26 | [361] Sofia Costoulas v 萨达 Nahimana [263] | 6-2,6-0 | |
| ITF W25圣多明各 | 02/22 13:30 | 25 | Sofia Costoulas v 艾丽莎•范兰根东克 | 6-3,0-6,6-3 | |
| ITF W25圣多明各 | 02/14 14:55 | 24 | Sofia Costoulas v 克拉拉•法拉塞拉尔 | 6-4,3-6,6-7 | |
| ITF W40墨西哥城 | 02/07 15:30 | 25 | [364] Sofia Costoulas v Despina 帕伯米查丽 [154] | 6-7,2-6 | |
| ITF W40墨西哥城 | 02/06 16:20 | 54 | [364] Sofia Costoulas v Rina Saigo [425] | 6-2,6-4 | |
| ITF W40墨西哥城 | 02/05 18:25 | 54 | Sofia Costoulas v 朱莉安娜•蒙罗伊 | 6-0,6-0 | |
| ITF W40墨西哥城 | 02/03 19:40 | 28 | [128] 袁悦 v Sofia Costoulas [406] | 6-4,6-1 | |
| ITF W40墨西哥城 | 02/02 18:30 | 27 | [406] Sofia Costoulas v 丽娜•格鲁什科 [260] | 6-3,6-3 | |
| ITF W40墨西哥城 | 02/01 17:20 | 26 | [406] Sofia Costoulas v 埃斯泰勒•卡希诺 [141] | 6-2,6-1 | |
| ITF W40墨西哥城 | 01/31 19:35 | 25 | [210] 苏珊•拉门斯 v Sofia Costoulas [406] | 5-7,0-6 | |
| ITF W25布宜诺斯艾利斯 | 01/18 14:15 | 25 | 香岱儿•萨旺特 v Sofia Costoulas | 6-7,6-4,6-1 | |
| ITF W25布宜诺斯艾利斯 | 01/14 13:00 | 28 | [441] Sofia Costoulas v 努丽娅•布兰卡乔 [265] | 2-6,3-6 | |
| ITF W25布宜诺斯艾利斯 | 01/13 14:00 | 27 | [441] Sofia Costoulas v 卡洛塔•马丁内斯•西雷兹 [315] | 6-2,6-0 | |
| ITF W25布宜诺斯艾利斯 | 01/12 17:50 | 26 | [390] 玉莲娜•利扎拉佐 v Sofia Costoulas [441] | 6-4,1-6,2-6 | |
| ITF W25布宜诺斯艾利斯 | 01/11 14:35 | 25 | 纳塔利 Siedliska v Sofia Costoulas | 6-4,5-7,2-6 | |
| ITF W25佩唐日 | 11/25 11:00 | 27 | [433] Sofia Costoulas v 马加里•科姆普恩 [241] | 4-6,3-6 | |
| ITF W25佩唐日 | 11/24 10:00 | 26 | 达里亚•洛佩特斯卡 v Sofia Costoulas | 7-5,5-7,2-6 | |
| ITF W25佩唐日 | 11/23 15:00 | 25 | [433] Sofia Costoulas v 奥黛丽•阿尔比 [318] | 6-7,7-6,6-2 | |
| ITF W25沙姆沙伊赫 | 11/16 07:30 | 25 | [440] 朱利亚 G-Monticone v Sofia Costoulas [430] | 6-3,6-3 | |
| ITF W25拉夫堡 | 10/26 10:30 | 26 | 玛蒂娜•库布卡 v Sofia Costoulas | Walkover | |
| ITF W25拉夫堡 | 10/25 15:00 | 25 | [449] Sofia Costoulas v 宫崎百合子 [215] | 6-2,3-6,6-3 | |
| ITF W25拉夫堡 | 10/24 10:40 | 54 | Sofia Costoulas v 霍利•哈钦森 | 6-3,7-6 | |
| ITF W25华欣 | 10/12 05:20 | 25 | Sofia Costoulas v 瀬間詠里花 | 3-6,5-7 | |
| ITF W25华欣 | 10/08 03:55 | 28 | [496] Sofia Costoulas v 尤晓迪 [304] | 6-4,1-6,2-6 | |
| ITF W25华欣 | 10/07 07:30 | 27 | [457] 马烨欣 v Sofia Costoulas [496] | 2-6,6-3,5-7 | |
| ITF W25华欣 | 10/06 07:05 | 26 | Sofia Costoulas v Anchisa Chanta | 4-6,6-4,6-0 | |
| ITF W25华欣 | 10/05 05:50 | 25 | 克拉拉•法拉塞拉尔 v Sofia Costoulas | 3-6,3-6 |
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.