Round: 44 Ground: Clay
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/03/31 11:00 | Yaniklar, Beyza v Casteleyn, Emily | 0-6,1-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/09/22 07:00 | Yaniklar, Beyza v Saitoglu, Selin | 6-0,6-0 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/06/03 07:30 | Wira, Klaudia v Yaniklar, Beyza | 6-1,6-0 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/04/14 11:00 | Heath, Gemma v Yaniklar, Beyza | 6-2,6-1 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/03/31 11:00 | Yaniklar, Beyza v Casteleyn, Emily | 0-6,1-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/03/04 08:30 | Stankovic, Aleksandra v Yaniklar, Beyza | 6-2,6-1 |
| 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 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 |