Round: 44 Ground: Clay
| ITF Women Stuttgart | 2018/01/23 12:00 | Isabella Pfennig v Laura Ioana Paar | 2-6,1-6 |
| ITF Women Petange | 2017/11/01 17:35 | Isabella Pfennig v Julia Victoria Rennert | 5-7,6-3,4-6 |
| ITF Women Petange | 2017/10/30 09:05 | Isabella Pfennig v Mina Hodzic | 6-3,6-1 |
| ITF Women Petange | 2017/10/29 09:00 | Dominique Meyer v Isabella Pfennig | 4-6,6-7 |
| ITF Women Petange | 2017/10/28 12:00 | Isabella Pfennig v Annelou Nab | 7-6,6-3 |
| WTA Linz Qual | 2017/10/07 14:35 | Isabella Pfennig v Anna Zaja | 1-6,1-6 |
| ITF Women Ismaning | 2016/10/16 08:00 | Maria Schneider v Isabella Pfennig | 6-4,6-4 |
| ITF Women Antalya | 2018/03/05 07:00 | Cagla Teoman v Andrijana Stoilkovic | 0-6,1-6 |
| ITF Women Antalya | 2018/02/03 06:30 | Nozomi Fujioka v Cagla Teoman | 6-0,6-0 |