2020 İstanbul Cup – Singles

Petra Martić was the defending champion, but she chose not to participate as she was still competing at the 2020 US Open.

Patricia Maria Țig won her maiden WTA tour-level singles title, defeating Eugenie Bouchard in the final, 2–6, 6–1, 7–6(7–4).

Seeds
• #🇷🇺 Svetlana Kuznetsova (second round)

• #🇸🇪 Rebecca Peterson (quarterfinals)

• # Polona Hercog (quarterfinals)

• #🇫🇷 Caroline Garcia (second round)

• #🇬🇧 Heather Watson (first round, retired)

• #🇧🇪 Alison Van Uytvanck (second round)

• #🇰🇿 Zarina Diyas (first round)

• #🇯🇵 Misaki Doi (second round)

Seeds
• # Stefanie Vögele (moved to main draw)

• # 🇷🇺 Margarita Gasparyan (moved to main draw)

• # 🇧🇬 Viktoriya Tomova (moved to main draw)

• # 🇨🇿 Tereza Martincová (qualified)

• # 🇺🇦 Marta Kostyuk (withdrew)

• # 🇮🇹 Elisabetta Cocciaretto (qualifying competition)

• # 🇬🇧 Harriet Dart (qualifying competition)

• # Leonie Küng (qualifying competition)

Qualifiers
• # 🇨🇦 Eugenie Bouchard

• # 🇦🇺 Ellen Perez

• # 🇷🇸 Olga Danilović

• # 🇨🇿 Tereza Martincová