Career
On 19 May 2014, she reached her best singles ranking of world number 1165. On 26 May 2014, she peaked at world number 802 in the doubles rankings. Qostal made her Women's Tennis Association tour debut at the 2013 Grand Prix Sons of the American Revolution Louisiana Princesse Lalla Meryem, having been awarded a wildcard into both the singles and doubles draws.
In singles, she was drawn against Karin Knapp and was beaten by the Italian in their first round encounter.
She partnered with Alizé Lim in the doubles event but fared no better there, ultimately losing to Sandra Klemenschits and Andreja Klepač in the first round. Qostal studied at Lycée Descartes in the capital city of Morocco, Rabat.
Doubles: 1 (1–0)Editorial
Singles
Doubles.