Stadium: Court 11 Round: 25 Ground: Grass
| ITF W25 Altenkirchen | 2019/02/18 18:45 | Gerlach, Katharina v Stephanie Wagner | 6-3,3-6,5-10 |
| ITF W25 Altenkirchen | 2019/02/18 13:55 | Gerlach, Katharina v Emily Webley-Smith | 6-2,6-4 |
| Shrewsbury, Simples W-ITF-GBR-02A | 2019/02/11 10:00 | Zimmermann, Kimberley v Gerlach, Katharina | 6-3,6-3 |
| Midland, Simples W-ITF-USA-03A | 2019/01/28 15:00 | Gleason, Quinn v Gerlach, Katharina | 2-6,6-2,10-7 |
| Newport Beach, USA | 2019/01/21 20:20 | Harmony Tan v Gerlach, Katharina | 6-4,6-2 |
| ITF Women Pune | 2018/11/28 06:55 | Valeriya Strakhova v Gerlach, Katharina | 7-6,7-5 |
| ITF Women Pune | 2018/11/26 04:30 | Gerlach, Katharina v Riya Bhatia | 6-0,6-3 |
| ITF Women Pune | 2018/11/25 07:25 | Gerlach, Katharina v Eden Silva | 6-2,6-2 |
| Osaka, Singles W-ITF-JPN-02A | 2019/03/01 01:00 | Fangzhou Liu v Hiroko Kuwata | 6-2,6-1 |
| Osaka, Singles W-ITF-JPN-02A | 2019/02/27 03:50 | Hiroko Kuwata v Inoue, Miyabi | 6-4,6-4 |
| ITF W60 Kyoto | 2019/02/19 08:30 | Hiroko Kuwata v Fangzhou Liu | 3-6,1-6 |
| Jodhpur, Singles Qualifying W-ITF-IND-01A | 2019/02/01 04:30 | Hiroko Kuwata v Imanishi, Miharu | 7-6,6-7,4-6 |
| Jodhpur, Singles Qualifying W-ITF-IND-01A | 2019/01/31 04:30 | Hiroko Kuwata v Hourigan, Paige Mary | 6-2,5-7,6-4 |
| Jodhpur, Singles Qualifying W-ITF-IND-01A | 2019/01/29 05:55 | Hiroko Kuwata v Nefisa Berberovic | 1-6,6-3,7-6 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/01/10 02:00 | Hiroko Kuwata v Ma, Shuyue | 6-7,6-2,4-6 |
| Hong Kong, Simples W-ITF-HKG-01B | 2019/01/08 04:45 | Hiroko Kuwata v Man Ying Maggie Ng | 6-1,6-2 |