An-Sophie Mestach
An-Sophie Mestach is a retired Belgian tennis player.
In her career, Mestach won two doubles titles on the WTA Tour, as well as six singles and eight doubles titles on the ITF Women's Circuit. On 14 September 2015, she reached her career-high singles ranking of world No. 98. On 1 February 2016, she peaked at No. 64 in the doubles rankings.
Ghent-born Mestach won the junior events of the 2011 Australian Open in both singles and doubles. Following these wins, she became the world No. 1 junior. She also won two Grade-A and three Grade-1 tournaments in singles on the junior circuit.
In 2012, Mestach made the final of one ITF event and the semifinals of two others. She ended the year with a ranking of world No. 361.
Playing for the Belgium Fed Cup team since 2010, Mestach has a win-loss record of 9–6 in Fed Cup competition.
WTA career finals
Doubles (2–1)
| Outcome | No. | Date | Category | Tournament | Surface | Partner | Opponents | Score |
| Runner-up | 1. | 14 February 2015 | Premier | Diamond Games, Antwerp | Hard |  Alison Van Uytvanck |  Anabel Medina Garrigues Arantxa Parra Santonja | 4–6, 6–3, |
| Winner | 1. | 19 September 2015 | International | Coupe Banque Nationale, Quebec City | Hard |  Barbora Krejčíková |  María Irigoyen  Paula Kania | 4–6, 6–3, |
| Winner | 2. | 8 January 2016 | International | ASB Classic, Auckland | Hard | Elise Mertens |  Danka Kovinić Barbora Strýcová | 2–6, 6–3, |
ITF finals
Singles (6–11)
| Outcome | No. | Date | Tournament | Surface | Opponent | Score |
| Runner-up | 1. | 16 May 2010 | Tortosa, Spain | Clay |  Victoria Larrière | 5–7, 6–4, 4–6 |
| Runner-up | 2. | 7 August 2010 | Balikpapan, Indonesia | Hard |  Nudnida Luangnam | 0–6, 6–3, 2–6 |
| Winner | 1. | 23 September 2012 | Antalya, Turkey | Hard |  Yurina Koshino | 6–3, 6–2 |
| Runner-up | 3. | 17 March 2013 | Bath, United Kingdom | Hard |  Stephanie Vogt | 6–7, 3–6 |
| Winner | 2. | 5 May 2013 | Gifu, Japan | Hard |  Wang Qiang | 1–6, 6–3, 6–0 |
| Runner-up | 4. | 12 May 2013 | Fukuoka, Japan | Grass |  Ons Jabeur | 6–7, 2–6 |
| Runner-up | 5. | 19 May 2013 | Kurume, Japan | Grass | Ons Jabeur | 0–6, 2–6 |
| Runner-up | 6. | 13 October 2013 | Joué-lès-Tours, France | Hard |  Mirjana Lučić-Baroni | 4–6, 2–6 |
| Winner | 3. | 26 January 2014 | Sunderland, United Kingdom | Hard |  Viktorija Golubic | 6–1, 6–4 |
| Winner | 4. | 13 September 2014 | Batumi, Georgia | Hard |  Olga Ianchuk | 6–2, 6–0 |
| Winner | 5. | 12 October 2014 | Monterrey, Mexico | Hard | Lourdes Domínguez Lino | 6–3, 7–5 |
| Runner-up | 7. | 18 October 2014 | Tampico, Mexico | Hard |  Mariana Duque | 6–3, 1–6, 6–7 |
| Winner | 6. | 23 November 2014 | Toyota, Japan | Carpet | Shuko Aoyama | 6–1, 6–1 |
| Runner-up | 8. | 19 July 2015 | Stockton, United States | Hard | Nao Hibino | 1–6, 6–7 |
| Runner-up | 9. | 26 July 2015 | Sacramento, United States | Hard | Anhelina Kalinina | 6–4, 4–6, 3–6 |
| Runner-up | 10. | 31 January 2016 | Andrézieux-Bouthéon, France | Hard | Stefanie Vögele | 1–6, 2–6 |
| Runner-up | 11. | 29 May 2016 | Karuizawa, Japan | Grass |  Nigina Abduraimova | 3–6, 5–7 |
Doubles (8–11)
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents | Score |
| Runner-up | 1. | 15 May 2009 | Antalya, Turkey | Clay | Sofie Oyen |  Amanda Carreras  Valentina Sulpizio | 6–4, 3–6, |
| Runner-up | 2. | 1 August 2009 | Bree, Belgium | Clay |  Demi Schuurs | Kiki Bertens Quirine Lemoine | 1–6, 0–6 |
| Winner | 1. | 13 September 2014 | Batumi, Georgia | Hard | Sandra Zaniewska |  Aleksandrina Naydenova Valeriya Strakhova | 6–1, 6–1 |
| Runner-up | 3. | 2 May 2015 | Gifu, Japan | Hard | Emily Webley-Smith | Wang Yafan Xu Yifan | 2–6, 3–6 |
| Runner-up | 4. | 21 June 2015 | Ilkley, United Kingdom | Grass | Demi Schuurs |  Raluca Olaru Xu Yifan | 3–6, 4–6 |
| Winner | 2. | 29 January 2016 | Andrézieux-Bouthéon, France | Hard | Elise Mertens | Viktorija Golubic Xenia Knoll | 6–4, 3–6, |
| Runner-up | 5. | 18 June 2016 | Ilkley, United Kingdom | Grass |  Storm Sanders | Yang Zhaoxuan Zhang Kailin | 3–6, 6–7 |
| Winner | 3. | 6 August 2016 | Granby, Canada | Hard |  Jamie Loeb |  Julia Glushko  Olga Govortsova | 6–4, 6–4 |
| Runner-up | 6. | 14 August 2016 | Landisville, United States | Hard | Elise Mertens | Freya Christie Laura Robson | 3–6, 4–6 |
| Runner-up | 7. | 14 October 2016 | Équeurdreville, France | Hard | Amandine Hesse |  Cornelia Lister  Polina Monova | 5–7, 6–4, |
| Runner-up | 8. | 12 November 2016 | Tokyo, Japan | Hard | Jamie Loeb | Rika Fujiwara Yuki Naito | 4–6, 7–6, |
| Winner | 4. | 19 May 2017 | Båstad, Sweden | Clay | Kimberley Zimmermann | Ilona Kremen Cornelia Lister | 4–6, 6–2, |
| Winner | 5. | 18 June 2017 | Manchester, United Kingdom | Grass | Magdalena Fręch |  Chang Kai-chen  Marina Erakovic | 6–4, 7–6 |
| Winner | 6. | 23 June 2017 | İzmir, Turkey | Hard |  Nina Stojanović |  Emma Laine Kotomi Takahata | 6–4, 7–5 |
| Winner | 7. | 17 September 2017 | Las Vegas, United States | Hard | Laura Robson | Sophie Chang Alexandra Mueller | 7–6, 7–6 |
| Runner-up | 9. | 30 September 2017 | Stillwater, United States | Hard | Harriet Dart | Jovana Jakšić Caitlin Whoriskey | 6–4, 4–6, |
| Runner-up | 10. | 15 April 2018 | Óbidos, Portugal | Carpet | Nina Stojanović | Sarah Beth Grey Olivia Nicholls | 6–4, 6–7, |
| Runner-up | 11. | 28 April 2018 | Óbidos, Portugal | Carpet | Freya Christie | Estrella Cabeza Candela Ángela Fita Boluda | 6–7, 6–1, |
| Winner | 8. | 14 July 2018 | Contrexéville, France | Clay | Zheng Saisai |  Prarthana Thombare Eva Wacanno | 3–6, 6–2, |