2019 İstanbul Cup – Singles

Pauline Parmentier was the defending champion, but lost in the second round to Elena Rybakina.

Petra Martić won her first WTA Tour title, defeating Markéta Vondroušová in the final, 1–6, 6–4, 6–1.

Seeds
• #🇪🇸 Carla Suárez Navarro (first round)

• #🇷🇴 Mihaela Buzărnescu (second round)

• #🇮🇹 Camila Giorgi (withdrew)

• #🇺🇦 Dayana Yastremska (first round)

• #🇦🇺 Ajla Tomljanović (first round)

• # Petra Martić (champion)

• #🇨🇿 Kateřina Siniaková (first round)

• # Maria Sakkari (first round)

• #🇸🇰 Viktória Kužmová (first round)

Seeds
• # 🇷🇺 Veronika Kudermetova (qualified)

• # 🇺🇦 Kateryna Kozlova (qualified)

• # 🇷🇸 Ivana Jorović (qualified)

• # 🇮🇱 Julia Glushko (qualifying competition, lucky loser)

• # 🇭🇺 Tímea Babos (qualifying competition, retired, lucky loser)

• # 🇭🇺 Fanny Stollár (first round)

• # 🇷🇴 Ana Bogdan (qualified)

• # 🇧🇬 Viktoriya Tomova (first round)

• # 🇲🇪 Danka Kovinić (first round, retired)

• # 🇰🇿 Elena Rybakina (qualified)

• # 🇷🇴 Alexandra Dulgheru (qualifying competition)

• # 🇦🇺 Arina Rodionova (first round)

Qualifiers
• # 🇷🇺 Veronika Kudermetova

• # 🇺🇦 Kateryna Kozlova

• # 🇷🇸 Ivana Jorović

• # 🇷🇴 Irina Bara

• # 🇰🇿 Elena Rybakina

• # 🇷🇴 Ana Bogdan

Lucky losers
• # 🇮🇱 Julia Glushko

• # 🇭🇺 Tímea Babos