2021 Engie Open de Biarritz

The 2021 Engie Open de Biarritz was a professional women's tennis tournament played on outdoor clay courts. It was the eighteenth edition of the tournament which was part of the 2021 ITF Women's World Tennis Tour. It took place in Biarritz, France between 12 and 18 July 2021.

Seeds

 * 1 Rankings are as of 28 June 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇫🇷 Loïs Boisson
 * 🇫🇷 Séléna Janicijevic
 * 🇫🇷 Margaux Rouvroy
 * 🇫🇷 Léa Tholey

The following player received entry using a protected ranking:
 * 🇺🇸 Louisa Chirico

The following player received entry using a junior exempt:
 * 🇺🇸 Emma Navarro

The following players received entry from the qualifying draw:
 * 🇬🇧 Amanda Carreras
 * 🇫🇷 Estelle Cascino
 * 🇩🇪 Anna Gabric
 * Joanna Garland
 * 🇫🇷 Léolia Jeanjean
 * 🇮🇹 Tatiana Pieri
 * 🇫🇷 Alice Robbe
 * 🇷🇺 Oksana Selekhmeteva

Singles

 * 🇬🇧 Francesca Jones def. 🇷🇺 Oksana Selekhmeteva, 6–4, 7–6(7–4)

Doubles

 * 🇷🇺 Oksana Selekhmeteva / Daniela Vismane def. 🇬🇧 Sarah Beth Grey / 🇧🇪 Magali Kempen, 6–3, 7–6(7–5)