2023 Zavarovalnica Sava Ljubljana – Singles

Marina Bassols Ribera won the title, defeating Zeynep Sönmez in the final, 6–0, 7–6(7–2).

Kateřina Siniaková was the reigning champion from 2022, when the tournament was a WTA 250 event, but she chose not to compete.

Seeds
• # 🇸🇰 Anna Karolína Schmiedlová (second round)

• # 🇪🇸 Aliona Bolsova (second round)

• # 🇭🇺 Dalma Gálfi (quarterfinals)

• # Tamara Zidanšek (semifinals)

• # 🇪🇸 Marina Bassols Ribera (champion)

• # Kaja Juvan (second round)

• # 🇨🇾 Raluca Șerban (first round)

• # Erika Andreeva (quarterfinals)

Seeds
• # 🇭🇺 Réka Luca Jani (qualifying competition, lucky loser)

• # 🇨🇿 Gabriela Knutson (qualified)

• # 🇺🇸 Ashley Lahey (qualified)

• # 🇨🇿 Michaela Bayerlová (qualified)

Qualifiers
• # 🇺🇦 Oleksandra Oliynykova

• # 🇨🇿 Gabriela Knutson

• # 🇺🇸 Ashley Lahey

• # 🇨🇿 Michaela Bayerlová

Lucky losers
• # 🇭🇺 Réka Luca Jani

• # 🇻🇪 Andrea Gámiz