2021 Oeiras Ladies Open – Singles

This was the first edition of the tournament.

Polona Hercog won the title after Clara Burel withdrew before the final.

Seeds
All seeds receive a bye into the second round. • # Polona Hercog (champion)

• # 🇧🇪 Greet Minnen (third round)

• # 🇺🇦 Anhelina Kalinina (semifinals)

• # 🇹🇷 Çağla Büyükakçay (withdrew)

• # 🇫🇷 Clara Burel (final, withdrew)

• # 🇱🇺 Mandy Minella (second round)

• # 🇫🇷 Chloé Paquet (second round)

• # 🇪🇸 Georgina García Pérez (semifinals)

• # Mariam Bolkvadze (second round)

• # 🇸🇰 Rebecca Šramková (third round)

• # 🇺🇦 Daria Snigur (third round)

• # 🇷🇸 Natalija Kostić (third round)

• # 🇬🇧 Francesca Jones (quarterfinals)

• # 🇮🇹 Martina Di Giuseppe (second round)

• # 🇷🇺 Marina Melnikova (second round)

• # 🇨🇳 Lu Jiajing (second round)