Stadium: Court 3 Round: 54
| ITF Women Les Contamines | 2018/07/22 08:00 | Lommer, Chiara v Sonnekus-Williams, Olivia | 6-2,6-2 |
| ITF Women Dijon | 2018/07/14 12:45 | Sonnekus-Williams, Olivia v Maneva Rakotomalala | 3-6,0-6 |
| ITF Women Verbier Qual | 2018/06/24 09:00 | Jessie Aney v Sonnekus-Williams, Olivia | 6-3,6-3 |
| ITF Women Verbier Qual | 2018/06/23 08:00 | Sonnekus-Williams, Olivia v Fiacan, Maria Michaela | 6-4,6-2 |
| ITF Women Klosters | 2018/06/17 08:00 | Tayisiya Morderger v Sonnekus-Williams, Olivia | 6-0,6-0 |
| ITF Women Klosters | 2018/06/16 08:00 | Sonnekus-Williams, Olivia v Fiacan, Maria Michaela | 6-7,6-3,6-4 |
| ITF Women Hammamet | 2018/05/10 09:00 | Sonnekus-Williams, Olivia v Noelia Zeballos | 1-6,1-6 |
| ITF Women Hammamet | 2018/05/09 11:50 | Sonnekus-Williams, Olivia v Milas, Katja | 6-4,6-3 |
| ITF Women Getxo | 2018/07/12 16:30 | Andrea Lazaro Garcia v Arbuthnott, Emily | 6-4,6-4 |
| ITF Women Getxo | 2018/07/10 12:30 | Laura Pigossi v Arbuthnott, Emily | 2-6,1-6 |
| ITF Women Getxo Qual | 2018/07/08 15:30 | Arbuthnott, Emily v Noelia Bouzo Zanotti | 6-2,6-1 |
| ITF Women Getxo Qual | 2018/07/07 16:30 | Arbuthnott, Emily v Retortillo Soiras, Alba | 6-2,6-1 |
| ITF Women Denain | 2018/07/03 14:50 | Allie Kiick v Arbuthnott, Emily | 6-3,6-0 |
| ITF Women Denain Qual | 2018/07/01 11:00 | Lebesheva, Darya v Arbuthnott, Emily | 3-6,0-6 |
| ITF Women Bastad | 2018/06/27 10:20 | Guttierez Carrasco, Maria v Arbuthnott, Emily | 6-0,6-2 |
| ITF Women Bastad Qual | 2018/06/25 11:55 | Arbuthnott, Emily v Viktorovitch, Alexandra | 6-1,6-2 |