2021 Engie Open Nantes Atlantique

The 2021 Engie Open Nantes Atlantique was a professional women's tennis tournament played on indoor hard courts. It was the seventeenth edition of the tournament which was part of the 2021 ITF Women's World Tennis Tour. It took place in Nantes, France between 1 and 7 November 2021.

Seeds

 * 1 Rankings are as of 25 October 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇫🇷 Audrey Albié
 * 🇫🇷 Carole Monnet
 * 🇫🇷 Mallaurie Noël
 * 🇫🇷 Alice Robbe

The following player received entry using a protected ranking:
 * 🇮🇳 Karman Thandi

The following player received entry as a special exempt:
 * Simona Waltert

The following players received entry from the qualifying draw:
 * 🇷🇺 Erika Andreeva
 * 🇺🇸 Emina Bektas
 * 🇫🇷 Sara Cakarevic
 * 🇬🇧 Sarah Beth Grey
 * 🇧🇮 Sada Nahimana
 * 🇹🇷 İpek Soylu
 * 🇨🇾 Raluca Șerban
 * Daniela Vismane

The following players received entry as lucky losers:
 * Diāna Marcinkēviča
 * 🇷🇺 Ekaterina Yashina

Singles

 * 🇺🇦 Anhelina Kalinina def. 🇫🇷 Océane Dodin, 7–6(7–4), 1–0, ret.

Doubles

 * 🇬🇧 Samantha Murray Sharan / 🇫🇷 Jessika Ponchet def. 🇬🇧 Alicia Barnett / 🇬🇧 Olivia Nicholls, 6–4, 6–2