Karin Knapp ITF Circuit finals Singles: 19 (6–13)

| Outcome | No_ | Date_ | Tournament | Surface | Opponent | Score_ |
|---|---|---|---|---|---|---|
| Runner-up | 7. | 9 April 2007 | Civitavecchia, Italy | Clay | Darya Kustova | 3–6, 6–4, 6–4 |
| Runner-up | 8. | 9 July 2007 | Biella, Italy | Clay | Agnieszka Radwańska | 6–3, 6–3 |
| Runner-up | 9. | 11 October 2010 | Settimo San Pietro, Italy | Clay | Anastasia Grymalska | 4–6, 6–2, 7–5 |
| Winner | 2. | 18 October 2010 | Seville, Spain | Clay | Andrea Gámiz | 6–0, 6–1 |
| Runner-up | 10. | 16 November 2010 | Mallorca, Spain | Clay | Diana Enache | 6–4, 6–2 |
| Winner | 3. | 7 June 2011 | Campobasso, Italy | Clay | Alizé Lim | 6–2, 6–4 |
| Runner-up | 11. | 14 June 2011 | Padova, Italy | Clay | Kristina Mladenovic | 3–6, 6–4, 6–0 |
| Winner | 4. | 20 June 2011 | Rome, Italy | Clay | Laura Thorpe | 6–3, 6–0 |
| Runner-up | 12. | 27 August 2012 | Bagnatica, Italy | Clay | Maria-Elena Camerin | 7–6(5), 6–4 |