2018 Zagreb Ladies Open – Singles

Dia Evtimova was the defending champion, having won the previous event in 2011, but chose not to participate.

Tereza Mrdeža won the title, defeating Paula Ormaechea in the final, 2–6, 6–4, 7–5.

Seeds
• # 🇺🇿 Sabina Sharipova (first round)

• # 🇧🇬 Viktoriya Tomova (second round)

• # 🇪🇸 Georgina García Pérez (quarterfinals)

• # Valentini Grammatikopoulou (second round)

• # 🇧🇬 Elitsa Kostova (second round)

• # 🇮🇹 Martina Di Giuseppe (first round)

• # 🇸🇰 Jana Čepelová (second round)

• # Tereza Mrdeža (champion)