Lena Rüffer
Lena Rüffer is a German tennis player.
Rüffer made her WTA Tour debut at the 2015 Nürnberger Versicherungscup, partnering Katharina Gerlach in the doubles tournament.
ITF Circuit finals
Singles (0–1)
| Outcome | No. | Date | Tournament | Surface | Opponent | Score |
| Runner-up | 1. | 17 February 2018 | Bergamo, Italy | Clay |  Martina Colmegna | 2–6, 1–6 |
Doubles: 5 (2–3)
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents | Score |
| Winner | 1. | 30 October 2015 | Ismaning, Germany | Carpet |  Anna Zaja |  Michaela Boev Hristina Dishkova | 5–7, 7–6, |
| Runner-up | 1. | 13 August 2017 | Hechingen, Germany | Clay | Romy Kölzer | Camilla Rosatello  Sofia Shapatava | 2–6, 4–6 |
| Winner | 2. | 2 December 2017 | Milovice, Czech Republic | Hard |  Jana Jablonovská |  Maryna Kolb Nadiya Kolb | 6–1, 6–3 |
| Runner-up | 2. | 2 March 2018 | Palma Nova, Spain | Clay | Katharina Gerlach |  Yukina Saigo Aiko Yoshitomi | 4–6, 2–6 |
| Runner-up | 3. | 17 March 2018 | Pula, Italy | Clay | Katharina Gerlach | Ekaterine Gorgodze Sofia Shapatava | 4–6, 6–7 |