Maria João Koehler
Maria João Koehler is a retired Portuguese tennis player.
Koehler has won three singles and four doubles titles on the ITF tour in her career. On 25 February 2013, she reached her best singles ranking of world number 102. On 18 June 2012, she peaked at world number 151 in the doubles rankings.
Playing for Portugal at the Fed Cup, Koehler has a win–loss record of 11–16.
Career
Born in Porto, Koehler made her debut on the ITF Women's Circuit at the age of 14 at a $10,000 event in Braga. Having qualified for the main draw, she lost her first match to Catarina Ferreira.She made her WTA tour main draw debut at the 2009 Estoril Open. Having been awarded a wild card, she played world number 77 Kristina Barrois in the first round, losing in straight sets.
ITF finals (7–12)
Singles (4–8)
| Result | No. | Date | Tournament | Tier | Surface | Opponent | Score |
| Runner-up | 1. | 9 June 2008 | Montemor-o-Novo, Portugal | Hard |  Mélanie Gloria | 7–6, 3–6, 1–6 | |
| Winner | 1. | 18 May 2009 | Cantanhede, Portugal | Carpet |  Nanuli Pipiya | 6–4, 2–6, 6–1 | |
| Winner | 2. | 1 June 2009 | Amarante, Portugal | Hard | Mélanie Gloria | 6–3, 6–2 | |
| Runner-up | 2. | 8 February 2010 | Vale do Lobo, Portugal | Hard |  Julia Mayr | 1–6, 1–6 | |
| Runner-up | 3. | 8 November 2010 | Majorca, Spain | Clay |  Lara Arruabarrena | 6–7, 3–6 | |
| Runner-up | 4. | 31 January 2011 | Rabat, Morocco | Clay | Nina Bratchikova | 6–3, 4–6, 1–6 | |
| Runner-up | 5. | 16 July 2012 | Donetsk, Ukraine | Hard |  Vesna Dolonc | 2–6, 3–6 | |
| Win | 3–5 | Jul 2012 | ITF Astana, Kazakhstan | 100,000 | Hard | Marta Sirotkina | 7–5, 6–2 |
| Runner-up | 6. | 8 October 2012 | Joué-lès-Tours, France | Hard |  Monica Puig | 6–3, 4–6, 1–6 | |
| Loss | 3–7 | Jul 2013 | ITF Astana, Kazakhstan | 100,000 | Hard |  Nadiia Kichenok | 4–6, 5–7 |
| Runner-up | 8. | 12 September 2016 | Ponta Delgada, Portugal | Hard |  Inês Murta | 4–6, 6–3, 6–7 | |
| Winner | 4. | 1 June 2018 | Guimarães, Portugal | Hard |  Zeel Desai | 6–1, 3–6, 6–1 |
Doubles (4–4)
| Result | No. | Date | Tournament | Surface | Partner | Opponents | Score |
| Winner | 1. | 11 May 2009 | Vila Real de Santo António, Portugal | Clay | Joana Pangaio Pereira | Rebeca Bou Nogueiro Sheila Solsona Carcasona | 2–2, ret. |
| Runner-up | 1. | 1 November 2010 | Majorca, Spain | Clay | Avgusta Tsybysheva | Lara Arruabarrena Inés Ferrer Suárez | 5–7, 2–6 |
| Runner-up | 2. | 15 November 2010 | Majorca, Spain | Clay | Avgusta Tsybysheva |  Diana Enache Raluca Elena Platon | 3–6, 6–7 |
| Winner | 2. | 11 July 2011 | Cáceres, Spain | Hard |  Richèl Hogenkamp |  Victoria Larrière Irena Pavlovic | 6–4, 6–4 |
| Runner-up | 3. | 29 August 2011 | Sarajevo, Bosnia and Herzegovina | Clay |  Florencia Molinero |  Maria Abramović Ana Vrljić | 7–5, 6–7, |
| Winner | 3. | 12 September 2011 | Zagreb, Croatia | Clay |  Katalin Marosi | Maria Abramović  Mihaela Buzărnescu | 6–0, 6–3 |
| Winner | 4. | 24 September 2011 | Shrewsbury, United Kingdom | Hard | Katalin Marosi |  Amanda Elliott  Johanna Konta | 7–6, 6–1 |
| Runner-up | 4. | 11 June 2012 | Nottingham, United Kingdom | Grass | Réka Luca Jani | Sally Peers Ashleigh Barty | 6–7, 6–3, |