Katharina Gerlach
Katharina Gerlach is a German tennis player.
She has won four singles and five doubles titles on the ITF Women's Circuit. On 13 August 2018, she reached her best singles ranking of world No. 315. On 2 July 2018, she peaked at No. 238 in the doubles rankings.
Gerlach made her WTA Tour debut at the 2015 Nürnberger Versicherungscup, partnering Lena Rüffer in doubles, but lost in the first round to eventual tournament champions Chan Hao-ching and Anabel Medina Garrigues.
ITF Circuit finals
Singles: 11 (4 titles, 7 runner–ups)
| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score |
| Loss | 0–1 | Aug 2015 | ITF Vienna, Austria | $10,000 | Clay |  Julia Grabher | 3–6, 6–3, 1–6 |
| Win | 1–1 | Sep 2016 | ITF Říčany, Czech Republic | $10,000 | Clay |  Miriam Kolodziejová | 7–5, 6–2 |
| Loss | 1–2 | Jan 2017 | ITF Hammamet, Tunisia | $15,000 | Clay |  Cristina Dinu | 2–6, 1–6 |
| Win | 2–2 | Jun 2017 | ITF Kaltenkirchen, Germany | $15,000 | Clay |  Magali Kempen | 6–4, 7–6 |
| Win | 3–2 | Sep 2017 | ITF Badenweiler, Germany | $15,000 | Clay |  Priscilla Heise | 6–4, 2–6, 6–4 |
| Loss | 3–3 | Jul 2018 | ITF Darmstadt, Germany | $25,000 | Clay |  Aliona Bolsova Zadoinov | 2–6, 1–6 |
| Win | 4–3 | Jul 2018 | ITF Horb, Germany | $25,000 | Clay |  Katarzyna Piter | 4–6, 6–3, 7–6 |
| Loss | 4–4 | Aug 2019 | ITF Bad Saulgau, Germany | W25+H | Clay | Sara Sorribes Tormo | 6–7, 1–6 |
| Loss | 4–5 | Aug 2019 | ITF Leipzig, Germany | W25 | Clay |  Jule Niemeier | 3–6, 3–6 |
| Loss | 4–6 | Aug 2019 | ITF Braunschweig, Germany | W25 | Clay |  Çağla Büyükakçay | 4–6, 2–6 |
| Loss | 4–7 | Aug 2019 | ITF Frýdek-Místek, Czech Republic | W25 | Clay |  Ekaterine Gorgodze | 1–6, 6–7 |
Doubles (5–2)
| Result | No. | Date | Tournament | Surface | Partner | Opponents | Score |
| Win | 1. | 13 June 2016 | Braunschweig, Germany | Clay | Katharina Hobgarski |  Anita Husarić  Nina Stojanović | 6–4, 6–3 |
| Win | 2. | 25 February 2017 | Palma Nova, Spain | Clay | Katharina Hobgarski | Yvonne Cavallé Reimers Olga Sáez Larra | 6–4, 6–4 |
| Win | 3. | 15 July 2017 | Versmold, Germany | Clay | Julia Wachaczyk |  Misa Eguchi Akiko Omae | 4–6, 6–1, |
| Loss | 1. | 2 March 2018 | Palma Nova, Spain | Clay | Lena Rüffer | Yukina Saigo Aiko Yoshitomi | 4–6, 2–6 |
| Loss | 2. | 17 March 2018 | Pula, Italy | Clay | Lena Rüffer | Ekaterine Gorgodze Sofia Shapatava | 4–6, 6–7 |
| Win | 4. | 16 June 2018 | Essen, Germany | Clay | Julia Wachaczyk |  Diana Marcinkevica  Chanel Simmonds | 6–4, 2–6, |
| Win | 5. | 23 June 2018 | Kaltenkirchen, Germany | Clay | Anna Gabric |  Vlada Ekshibarova  Sviatlana Pirazhenka | 6–2, 5–7, |