An-Sophie Mestach (born 7 March 1994) 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.