Round: 54 Ground: Hardcourt outdoor
| ITF Women Frydek Mistek | 2018/09/08 10:40 | Samantha Koelliker v Sofia Milatova | 3-6,2-6 |
| ITF Women Badenweiler | 2018/09/01 09:00 | Maja Issler v Samantha Koelliker | 7-5,6-4 |
| ITF Women Verbier | 2018/06/27 12:35 | Diana Martynov v Samantha Koelliker | 6-3,4-6,6-2 |
| ITF Women Verbier | 2018/06/25 07:00 | Ayline Esina Samardzic v Samantha Koelliker | 4-6,5-7 |
| ITF Women Klosters | 2018/06/17 08:00 | Thaisa Grana Pedretti v Samantha Koelliker | 6-1,6-1 |
| ITF Women Klosters | 2018/06/16 08:00 | Dominique Meyer v Samantha Koelliker | 2-6,6-3,2-6 |
| ITF Women Prerov Qual | 2018/06/09 11:00 | Marketa Petruzelova v Samantha Koelliker | 6-2,6-0 |
| ITF Women Tacarigua | 2018/05/05 15:00 | Gail Brodsky v Samantha Koelliker | 6-2,6-1 |