2015 İstanbul Cup – Singles

Caroline Wozniacki was the defending champion, but she chose not to participate this year.

Lesia Tsurenko won the title, defeating Urszula Radwańska in the final 7–5, 6–1.

Seeds
• # 🇺🇸 Venus Williams (first round)

• # 🇺🇦 Elina Svitolina (first round)

• # 🇷🇸 Jelena Janković (first round)

• # 🇫🇷 Alizé Cornet (second round)

• # 🇮🇹 Camila Giorgi (second round)

• # 🇷🇺 Daria Gavrilova (first round)

• # 🇷🇺 Anastasia Pavlyuchenkova (first round)

• # 🇧🇬 Tsvetana Pironkova (quarterfinals)

Seeds
• # 🇷🇺 Elizaveta Kulichkova (moved to main draw)

• # 🇨🇿 Kristýna Plíšková (first round)

• # 🇷🇺 Margarita Gasparyan (qualified)

• # 🇺🇦 Kateryna Bondarenko (qualified)

• # 🇨🇳 Zhu Lin (qualifying competition)

• # Jeļena Ostapenko (qualified)

• # 🇺🇸 Anna Tatishvili (qualified)

• # 🇷🇺 Alexandra Panova (qualified)

• # 🇯🇵 Misa Eguchi (first round)

• # 🇨🇿 Andrea Hlaváčková (qualifying competition)

• # 🇪🇪 Anett Kontaveit (first round)

• # 🇨🇳 Yang Zhaoxuan (first round)

• # 🇺🇦 Yuliya Beygelzimer (first round)

Qualifiers
• # 🇷🇺 Alexandra Panova

• # 🇺🇦 Olga Savchuk

• # 🇷🇺 Margarita Gasparyan

• # 🇺🇦 Kateryna Bondarenko

• # 🇺🇸 Anna Tatishvili

• # Jeļena Ostapenko