2017 St. Petersburg Ladies' Trophy – Singles

The 2017 St. Petersburg Ladies' Trophy – Singles season began with Roberta Vinci (defending champion from the previous year) losing out in the quarterfinals to unseeded Kristina Mladenovic.

Mladenovic went on to win the season and achieve her first WTA singles title, defeating Yulia Putintseva in the final, 6–2, 6–7(3–7), 6–4.

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

• # 🇸🇰 Dominika Cibulková (semifinals)

• # 🇷🇺 Svetlana Kuznetsova (quarterfinals)

• # 🇺🇸 Venus Williams (second round)

• # 🇷🇺 Elena Vesnina (quarterfinals)

• # 🇮🇹 Roberta Vinci (quarterfinals)

• # Kiki Bertens (first round)

• # 🇷🇺 Daria Kasatkina (second round)

Seeds
• # 🇩🇪 Andrea Petkovic (qualified)

• # 🇧🇪 Kirsten Flipkens (qualified)

• # 🇮🇹 Camila Giorgi (withdrew due to a lower back injury)

• # 🇧🇪 Elise Mertens (qualified)

• # 🇨🇿 Denisa Allertová (second round)

• # 🇷🇺 Irina Khromacheva (first round)

• # Donna Vekić (qualifying competition, lucky loser)

• # 🇷🇴 Patricia Maria Țig (first round, retired)

• # 🇷🇺 Ekaterina Alexandrova (second round)

Qualifiers
• # 🇩🇪 Andrea Petkovic

• # 🇧🇪 Kirsten Flipkens

• # Stefanie Vögele (withdrew)

• # 🇧🇪 Elise Mertens

Lucky losers

 * 1) ''' Donna Vekić