Stadium: Court 7 Round: 26
| ITF Women Daytona Beach | 2018/01/10 22:20 | Renata Zarazua v Gerlach, Katharina | 4-6,5-7 |
| Daytona Beach, Singles Qualifying W-WITF-USA-01A | 2018/01/09 14:30 | Gerlach, Katharina v Ryngler, Alexa | 6-1,6-3 |
| Daytona Beach, Singles Qualifying W-WITF-USA-01A | 2018/01/08 19:30 | Gerlach, Katharina v Pierson, Rachel May | 6-3,6-2 |
| Daytona Beach, Singles Qualifying W-WITF-USA-01A | 2018/01/07 15:00 | Gerlach, Katharina v Djoubri, Salma | 6-2,6-0 |
| ITF Women Castellon | 2017/11/28 13:45 | Gerlach, Katharina v Noelia Bouzo Zanotti | 6-4,6-4 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2017/10/06 13:00 | Honcova, Michaela v Gerlach, Katharina | 3-6,7-5,6-3 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2017/10/05 16:05 | Dascalu, Nicoleta-Catalina v Gerlach, Katharina | 6-4,3-6,6-7 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2017/10/04 15:15 | Gerlach, Katharina v Dejana Radanovic | 6-0,7-6 |
| ITF Women Daytona Beach | 2018/01/10 21:00 | Perper, Alexandra v Simmonds, Chanel | 4-6,7-6,10-7 |
| ITF Women Heraklion | 2017/11/25 09:00 | Vlada Ekshibarova v Perper, Alexandra | 7-5,7-5 |
| ITF Women Heraklion | 2017/11/24 09:00 | Perper, Alexandra v Yana Morderger | 6-3,6-1 |
| ITF Women Heraklion | 2017/11/23 07:30 | Perper, Alexandra v Boev, Michaela | 2-6,7-6,7-6 |
| ITF Women Heraklion | 2017/11/22 08:40 | Perper, Alexandra v Ochsner, Svenja | 6-1,6-2 |
| ITF Women Heraklion | 2017/11/17 08:00 | Perper, Alexandra v Gaspar-Ivan, Ioana | 6-7,2-6 |
| ITF Women Heraklion | 2017/11/16 08:00 | Perper, Alexandra v Boev, Michaela | 6-3,6-4 |
| ITF Women Heraklion | 2017/11/14 10:25 | Perper, Alexandra v Teodora Stinga | 7-5,6-3 |