Stadium: Hard 5 Round: 25 Ground: Clay
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/09/24 07:30 | Di Battista, Elena v Casteleyn, Emily | 2-6,1-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/09/23 09:30 | Yaniklar, Beyza v Casteleyn, Emily | 1-6,1-6 |
| ITF Women Wanfercee-Baulet | 2018/08/21 15:55 | Eliessa Vanlangendonck v Casteleyn, Emily | 6-4,6-2 |
| ITF Women Wanfercee-Baulet | 2018/08/20 07:30 | Issler, Maja v Casteleyn, Emily | 6-1,5-7,3-6 |
| ITF Women Oldenzaal | 2018/08/12 09:30 | Casteleyn, Emily v Dijkman, Dewi | 6-4,5-7,5-7 |
| Koksijde, Singles W-WITF-BEL-04A | 2018/08/04 10:00 | Casteleyn, Emily v Chantraine, Catherine | 3-6,1-6 |
| 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 Badenweiler | 2018/09/06 11:05 | Chantal Sauvant v Rebeka Masarova | 2-6,2-6 |
| ITF Women Badenweiler | 2018/09/04 11:45 | Olga Helmi v Chantal Sauvant | 3-6,4-6 |
| ITF Women Haren | 2018/08/29 14:25 | Chantal Sauvant v Maria Paulina Perez Garcia | 0-6,6-3,5-7 |
| ITF Women Rotterdam | 2018/08/21 08:00 | Chantal Sauvant v Sumova, Diana | 2-6,6-3,1-6 |
| ITF Women Leipzig | 2018/08/12 09:00 | Chantal Sauvant v Stephanie Wagner | 1-6,0-6 |
| ITF Women Dijon | 2018/07/16 13:05 | Chantal Sauvant v Emmanuelle Salas | 7-5,1-6,5-7 |
| ITF Women Kaltenkirchen | 2018/06/23 10:00 | Chantal Sauvant v Vlada Ekshibarova | 2-6,6-4,1-6 |
| ITF Women Kaltenkirchen | 2018/06/22 13:00 | Chantal Sauvant v Anna Klasen | 6-1,6-3 |