2018 Kremlin Cup – Women's singles

Julia Görges was the defending champion, but chose to compete in Luxembourg instead.

Daria Kasatkina won the title, defeating Ons Jabeur in the final, 2–6, 7–6(7–3), 6–4.

Jabeur became the first player representing Tunisia to reach a WTA final. With her win over Jabeur, Kasatkina broke inside the top 10 world ranking for the first time in her career, and qualified for the 2018 WTA Finals as the first alternate, replacing Aryna Sabalenka.

Seeds
The top four seeds received a bye into the second round. • #🇷🇴 Simona Halep (withdrew)

• #🇨🇿 Karolína Plíšková (second round)

• #🇺🇸 Sloane Stephens (second round)

• # Kiki Bertens (second round)

• # Anastasija Sevastova (semifinals)

• #🇷🇺 Daria Kasatkina (champion)

• #🇧🇪 Elise Mertens (first round)

• #🇪🇪 Anett Kontaveit (quarterfinals)

Seeds
• # 🇷🇴 Irina-Camelia Begu (moved to main draw)

• # 🇷🇴 Ana Bogdan (second round)

• # 🇷🇺 Evgeniya Rodina (first round)

• # 🇹🇳 Ons Jabeur (qualified)

• # 🇷🇺 Natalia Vikhlyantseva (qualified)

• # 🇷🇺 Vitalia Diatchenko (qualifying competition, lucky loser)

• # 🇩🇪 Laura Siegemund (second round)

• # 🇪🇸 Georgina García Pérez (second round)

Qualifiers
• # 🇷🇺 Vera Zvonareva

• # 🇷🇺 Natalia Vikhlyantseva

• # 🇷🇺 Irina Khromacheva

• # 🇹🇳 Ons Jabeur

Lucky losers
• # 🇷🇺 Vitalia Diatchenko

• # Valentini Grammatikopoulou