The ENGIE OPEN Biarritz (previously known as the Open GDF Suez de Biarritz) is a tournament for professional female tennis players played on outdoor clay courts. The event is classified as a $60,000 ITF Women's Circuit tournament and has been held in Biarritz, France, since 2003 (then a $25,000 category tournament). The 2024 Engie Open de Biarritz was upgraded to a $100,000 tournament.