2023 Oeiras CETO Open – Singles

Diana Shnaider was the defending champion but chose not to participate.

Nigina Abduraimova won the title, defeating Francisca Jorge in the final, 1–6, 6–4, 6–3.

Seeds
• # 🇦🇺 Olivia Gadecki (first round)

• # 🇦🇹 Sinja Kraus (second round, retired)

• # 🇫🇷 Elsa Jacquemot (quarterfinals)

• # 🇧🇪 Greet Minnen (semifinals)

• # 🇺🇿 Nigina Abduraimova (champion)

• # 🇲🇽 Fernanda Contreras (semifinals)

• # 🇧🇪 Magali Kempen (second round)

• # 🇩🇪 Mona Barthel (first round)