2023 L'Open 35 de Saint-Malo – Singles

Beatriz Haddad Maia was the defending champion, but chose to participate in the Madrid Open, instead.

Sloane Stephens won the title, defeating Greet Minnen in the final, 6–3, 6–4. This was Stephens first WTA 125 title, despite having won titles in the main WTA Tour.

Seeds
• #🇺🇸 Sloane Stephens (champion)

• #🇺🇸 Claire Liu (first round)

• #🇧🇪 Maryna Zanevska (second round)

• #🇧🇪 Ysaline Bonaventure (second round)

• #🇮🇹 Lucia Bronzetti (second round)

• #🇨🇿 Tereza Martincová (first round, retired)

• #🇵🇱 Magdalena Fręch (quarterfinals)

• #🇺🇸 Emma Navarro (quarterfinals)

Seeds
• # 🇫🇷 Carole Monnet (qualified)

• # Iryna Shymanovich (qualified)

• # 🇫🇷 Alice Robbe (qualified)

• # 🇫🇷 Émeline Dartron (qualified)

• # 🇬🇧 Freya Christie (qualifying competition, lucky loser)

• # 🇩🇪 Yana Morderger (qualifying competition)

• # 🇺🇸 Amy Zhu (qualifying competition)

• # 🇩🇪 Tayisiya Morderger (first round)

Qualifiers
• # 🇫🇷 Carole Monnet

• # Iryna Shymanovich

• # 🇫🇷 Alice Robbe

• # 🇫🇷 Émeline Dartron

Lucky loser
• # 🇬🇧 Freya Christie