2023 Copa Oster – Singles

This was the first WTA 125 tournament in Cali since 2013. Lara Arruabarrena was the champion when the event was last held, but she retired from professional tennis in August 2022.

Nadia Podoroska won the title, defeating Paula Ormaechea in the final, 6–4, 6–2.

Seeds
• # 🇭🇺 Réka Luca Jani (first round)

• # 🇧🇷 Laura Pigossi (semifinals)

• # 🇪🇸 Aliona Bolsova (second round)

• # 🇦🇷 María Lourdes Carlé (first round)

• # 🇺🇸 Caroline Dolehide (first round)

• # 🇺🇸 Hailey Baptiste (first round)

• # 🇨🇦 Carol Zhao (first round)

• # 🇲🇽 Fernanda Contreras Gómez (quarterfinals)

Seeds
• # 🇧🇷 Carolina Alves (qualified)

• # 🇯🇵 Kyōka Okamura (first round)

• # 🇩🇪 Luisa Meyer auf der Heide (first round)

• # 🇺🇦 Valeriya Strakhova (moved to main draw)

• # 🇮🇹 Martina Colmegna (qualified)

• # 🇫🇷 Marine Partaud (qualified)

• # 🇦🇺 Olivia Tjandramulia (first round)

• # Amina Anshba (qualifying competition)

Qualifiers
• # 🇧🇷 Carolina Alves

• # 🇮🇹 Martina Colmegna

• # 🇺🇸 Quinn Gleason

• # 🇫🇷 Marine Partaud