2018 Libéma Open – Women's singles

Anett Kontaveit was the defending champion, but lost in the first round to Veronika Kudermetova.

Aleksandra Krunić won her first WTA singles title, defeating Kirsten Flipkens in the final, 6–7(0–7), 7–5, 6–1.

Seeds
• # 🇺🇸 CoCo Vandeweghe (semifinals)

• # 🇧🇪 Elise Mertens (second round)

• # Kiki Bertens (second round)

• # 🇪🇪 Anett Kontaveit (first round)

• # 🇨🇳 Zhang Shuai (first round)

• # 🇧🇪 Alison Van Uytvanck (second round)

• # 🇷🇸 Aleksandra Krunić (champion)

• # 🇧🇾 Aryna Sabalenka (quarterfinals)

Seeds
• # 🇷🇺 Anna Blinkova (qualified)

• # 🇩🇪 Antonia Lottner (qualified)

• # 🇨🇿 Tereza Martincová (qualifying competition, lucky loser)

• # 🇭🇺 Fanny Stollár (qualified)

• # 🇷🇺 Veronika Kudermetova (qualified)

• # Valentini Grammatikopoulou (qualified)

• # 🇦🇹 Barbara Haas (first round)

• # Lesley Kerkhove (qualifying competition)

• # 🇲🇽 Renata Zarazúa (qualifying competition)

• # 🇺🇸 Victoria Duval (qualifying competition)

• # 🇦🇺 Ellen Perez (first round)

• # 🇷🇺 Marina Melnikova (qualified)

Qualifiers
• # 🇷🇺 Anna Blinkova

• # 🇩🇪 Antonia Lottner

• # 🇷🇺 Marina Melnikova

• # 🇭🇺 Fanny Stollár

• # 🇷🇺 Veronika Kudermetova

• # Valentini Grammatikopoulou

Lucky loser
• # 🇨🇿 Tereza Martincová