Round: 54 Ground: Clay
| ITF Women Brussels Qual | 2018/07/16 12:15 | Maria Vittoria Viviani v Casteleyn, Emily | 6-2,6-2 |
| ITF Women Brussels Qual | 2018/07/15 11:45 | Maelys Bougrat v Casteleyn, Emily | 1-6,3-6 |
| ITF Women Brussels Qual | 2018/07/14 11:40 | Bastin, Juliette v Casteleyn, Emily | 1-6,2-6 |
| ITF Women Knokke | 2018/07/08 12:00 | Casteleyn, Emily v Defossez, Anais | 7-6,1-6,1-6 |
| ITF Women Knokke | 2018/07/07 12:30 | Casteleyn, Emily v Anger, Jenifer | 6-2,6-2 |
| ITF Women Den Haag Qual | 2018/07/02 12:45 | Casteleyn, Emily v Stevens, Lexie | 2-6,2-6 |
| ITF Women Den Haag Qual | 2018/07/01 10:30 | Alice Gillan v Casteleyn, Emily | 6-2,0-6,6-7 |
| ITF Women Den Haag Qual | 2018/06/30 09:30 | Mader, Corina v Casteleyn, Emily | 6-4,2-6,0-6 |
| ITF Women Brussels | 2018/07/18 09:00 | Noa Liauw A Fong v Chantraine, Catherine | 6-3,6-4 |
| ITF Women Knokke | 2018/07/11 08:00 | Chantraine, Catherine v Ukolova, Anna | 4-6,4-6 |
| ITF Women Knokke | 2018/07/10 10:00 | Chantraine, Catherine v Defossez, Anais | 2-6,6-1,6-2 |
| ITF Women Den Haag | 2018/07/03 08:00 | Chantraine, Catherine v Eva Vedder | 2-6,6-7 |
| ITF Women Tunis Qual | 2018/04/08 12:00 | Chantraine, Catherine v Yerolymos, Margot | 2-6,4-6 |
| ITF Women Tunis Qual | 2018/04/07 11:00 | Chantraine, Catherine v Piskun, Oleksandra | 6-1,7-6 |
| ITF Women Hammamet | 2018/04/05 09:00 | Gonzalez, Montserrat v Chantraine, Catherine | 6-1,6-4 |
| ITF Women Hammamet | 2018/04/04 11:25 | Chantraine, Catherine v Sofradzija, Adna | 6-0,6-1 |