Katharina Lehnert
Katharina Melissa Lehnert is a Filipino-German tennis player. Lehnert has a German father and a Filipino mother; she represented Germany on the ITF circuit until 2013 when she decided to represent Philippines.
Lehnert has a WTA singles career-high ranking of No. 389, achieved on 22 April 2013. She also has a doubles career high ranking of No. 451, achieved on 24 August 2015. Lehnert has won four ITF singles and three ITF doubles titles.
Playing for Philippines in Fed Cup, Lehnert has a W/L record of 13–8.
ITF finals: 21 (7–14)
Singles: 8 (4–4)
| Outcome | No. | Date | Tournament | Surface | Opponent | Score |
| Runner-up | 1. | 12 May 2012 | Båstad, Sweden | Clay |  Eugenie Bouchard | 6–7, 0–6 |
| Winner | 1. | 26 August 2012 | Braunschweig, Germany | Clay |  Cindy Burger | 6–4, 2–6, 7–6 |
| Runner-up | 2. | 8 April 2013 | Antalya, Turkey | Hard |  Viktorija Golubic | 2–6, 3–6 |
| Winner | 2. | 12 January 2015 | Sharm El Sheikh, Egypt | Hard | Eva Wacanno | 7–5, 3–6, 6–4 |
| Winner | 3. | 31 August 2015 | Engis, Belgium | Clay |  Vivian Heisen | 6–3, 2–6, 6–1 |
| Runner-up | 3. | 7 September 2015 | Prague, Czech Republic | Clay |  Lenka Juríková | 3–6, 4–6 |
| Winner | 4. | 17 October 2015 | Sharm El Sheikh, Egypt | Hard |  Veronica Miroshnichenko | 6–4, 6–3 |
| Runner-up | 4. | 15 October 2016 | Hua Hin, Thailand | Hard |  Li Yixuan | 6–2, 4–6, 3–6 |
Doubles: 13 (3–10)
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents | Score |
| Runner-up | 1. | 9 November 2009 | Manila, Philippines | Hard |  Czarina Mae Arevalo |  Han Na-lae Yoo Mi | 0–6, 3–6 |
| Runner-up | 2. | 22 8 2011 | Braunschweig, Germany | Clay | Sabrina Baumgarten |  Huỳnh Phương Đài Trang  Karen Barbat | 2–6, 4–6 |
| Runner-up | 3. | 18 3 2012 | Amiens, France | Clay |  Katharina Negrin | Bernice van de Velde Nicolette van Uitert | 6–2, 6–7, |
| Winner | 1. | 1 April 2013 | Antalya, Turkey | Hard | Viktorija Golubic |  Martina Borecká Petra Krejsová | 5–7, 6–3, |
| Runner-up | 4. | 15 July 2013 | Imola, Italy | Carpet |  Alice Matteucci |  Lyudmyla Kichenok  Jeļena Ostapenko | 4–6, 6–3, |
| Runner-up | 5. | 16 September 2013 | Antalya, Turkey | Hard | Chantal Škamlová |  Deniz Khazaniuk  Ksenia Palkina | 7–6, 6–7, |
| Runner-up | 6. | 28 February 2014 | Bron, France | Hard | Anna Klasen | Alyona Sotnikova  Isabella Shinikova | 7–5, 6–7, |
| Winner | 2. | 5 April 2014 | Manama, Bahrain | Hard | Michaela Frlicka | Linda Dubská Evgeniya Svintsova | 6–0, 6–2 |
| Winner | 3. | 4 May 2015 | Puszczykowo, Poland | Hard | Margarita Lazareva |  Maria Fernanda Alves Zuzana Zlochová | 6–3, 6–3 |
| Runner-up | 7. | 29 June 2015 | Toruń, Poland | Clay |  Magdalena Fręch |  Ekaterine Gorgodze Sofia Shapatava | 4–6, 4–6 |
| Runner-up | 8. | 16 August 2015 | Hechingen, Germany | Clay | Vivian Heisen |  Andrea Gámiz Anastasiya Vasylyeva | 6–4, 6–7, |
| Runner-up | 9. | 16 July 2016 | Olomouc, Czech Republic | Clay | Anastasiya Shoshyna |  Ema Burgic Bucko Jasmina Tinjic | 5–7, 3–6 |
| Runner-up | 10. | 3 February 2017 | Almaty, Kazakhstan | Hard | Pia König | Olga Doroshina Polina Monova | 1–6, 2–6 |