2019 St. Petersburg Ladies' Trophy – Singles

Petra Kvitová was the defending champion, but lost to Donna Vekić in the quarterfinals.

Kiki Bertens won the title, defeating Vekić in the final, 7–6(7–2), 6–4.

Seeds
The top four seeds received a bye into the second round. • # 🇨🇿 Petra Kvitová (quarterfinals)

• # Kiki Bertens (champion)

• # 🇷🇺 Daria Kasatkina (quarterfinals)

• # 🇧🇾 Aryna Sabalenka (semifinals)

• # 🇩🇪 Julia Görges (second round)

• # Jeļena Ostapenko (second round)

• # 🇸🇰 Dominika Cibulková (withdrew)

• # Donna Vekić (final)

Seeds
• # 🇸🇰 Viktória Kužmová (second round)

• # Belinda Bencic (second round)

• # 🇧🇾 Vera Lapko (first round)

• # 🇩🇪 Andrea Petkovic (second round)

• # 🇺🇸 Bernarda Pera (first round)

• # 🇷🇺 Ekaterina Alexandrova (qualified)

• # 🇪🇸 Lara Arruabarrena (first round)

• # 🇷🇺 Margarita Gasparyan (qualified)

Qualifiers
• # 🇧🇪 Ysaline Bonaventure

• # 🇷🇺 Margarita Gasparyan

• # 🇷🇺 Ekaterina Alexandrova

• # 🇨🇿 Tereza Martincová

Lucky loser
• # 🇷🇺 Veronika Kudermetova

• # 🇬🇧 Katie Boulter