Stadium: Court 2 Round: 25 Ground: Clay
| WTA Stuttgart Qual | 2018/04/21 11:45 | Su-Wei Hsieh v Gerlach, Katharina | 2-6,7-5,6-2 |
| ITF Women Santa Margherita Qual | 2018/03/27 13:00 | Di Giuseppe, Martina v Gerlach, Katharina | 6-3,7-5 |
| ITF Women Santa Margherita Qual | 2018/03/21 10:30 | Tena Lukas v Gerlach, Katharina | 6-4,6-2 |
| ITF Women Santa Margherita Qual | 2018/03/19 13:00 | Vrljic, Ana v Gerlach, Katharina | 4-6,3-6 |
| ITF Women Santa Margherita Qual | 2018/03/13 13:00 | Manon Arcangioli v Gerlach, Katharina | 6-3,6-3 |
| Manacor (Mallorca), Singles Quali W-WITF-ESP-01A | 2018/03/02 09:00 | Ylena In-Albon v Gerlach, Katharina | 5-7,7-5,6-1 |
| Manacor (Mallorca), Singles Quali W-WITF-ESP-01A | 2018/03/01 10:40 | Gerlach, Katharina v Perper, Alexandra | 6-4,6-2 |
| Manacor (Mallorca), Singles Quali W-WITF-ESP-01A | 2018/02/28 08:30 | Gerlach, Katharina v Hosonuma, Chisa | 6-3,6-4 |
| ITF Women Wiesbaden | 2018/04/26 11:10 | Dalma Galfi v Heise, Priscilla | 2-6,3-6 |
| ITF Women Wiesbaden | 2018/04/24 12:45 | Dalma Galfi v Sabrina Santamaria | 6-4,6-2 |
| ITF Women Chiasso | 2018/04/20 09:30 | Dalma Galfi v Raluca Georgiana Serban | 3-6,3-6 |
| ITF Women Chiasso | 2018/04/19 11:10 | Dalma Galfi v Pereira, Teliana | 4-6,6-3,6-3 |
| Toyota, Singles W-WITF-JPN-02A | 2018/03/13 01:00 | Dalma Galfi v Robson, Laura | 6-3,1-6,6-7 |
| Yokohama, Singles W-WITF-JPN-01B | 2018/03/06 03:10 | Dalma Galfi v Namigata, Junri | 5-6 |
| WTA Budapest Qual | 2018/02/18 18:40 | Cepelova, Jana v Dalma Galfi | 7-6,4-6,7-6 |
| Fed Cup, Groupe Mondial | 2018/02/10 14:00 | Heather Watson v Dalma Galfi | 3-6,6-1,6-4 |