Stadium: Court 5 Round: 62 Ground: Clay
| 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 Santa Margherita Qual | 2017/10/03 10:30 | Gerlach, Katharina v Robillard-Millette, Charlotte | 6-3,6-2 |
| Santa Margherita Di Pula, Simples W-WITF-ITA-27A | 2017/09/27 13:00 | Polona Hercog v Gerlach, Katharina | 6-2,5-7,6-4 |
| Daytona Beach, Singles Qualifying W-WITF-USA-01A | 2018/01/08 19:30 | Ryngler, Alexa v Emiliana Arango | 6-1,6-3 |
| Daytona Beach, Singles Qualifying W-WITF-USA-01A | 2018/01/07 15:00 | Thoma, Alexis v Ryngler, Alexa | 1-6,0-6 |
| ITF Women Santiago | 2017/12/06 14:00 | Chiara Scholl v Ryngler, Alexa | 6-1,6-3 |
| ITF Women Santiago | 2017/12/04 14:00 | Wuarin, Pauline v Ryngler, Alexa | 2-6,0-6 |
| ITF Women Santiago Qual | 2017/12/03 14:00 | Ryngler, Alexa v Bosch, Maria Virginia | 6-1,6-0 |
| ITF Women Santiago | 2017/11/29 16:45 | Brito, Fernanda v Ryngler, Alexa | 6-0,6-1 |
| ITF Women Santiago | 2017/11/28 15:55 | Vazquez, Maria Del Rosario v Ryngler, Alexa | 0-6,3-6 |
| ITF Women Norman Qual | 2017/11/13 18:00 | Ryngler, Alexa v Elysia Bolton | 2-6,2-6 |