2013 St. Petersburg Open – Singles

Martin Kližan was the defending champion, but withdrew before the tournament began.

Ernests Gulbis won the title, defeating Guillermo García-López in the final, 3–6, 6–4, 6–0.

Seeds
• # 🇮🇹 Fabio Fognini (second round, retired)

• # 🇷🇺 Mikhail Youzhny (second round)

• # 🇷🇸 Janko Tipsarević (first round)

• # 🇷🇺 Dmitry Tursunov (quarterfinals)

• # 🇪🇸 Fernando Verdasco (first round)

• # Ernests Gulbis (champion)

• # 🇨🇿 Lukáš Rosol (quarterfinals)

• # 🇺🇿 Denis Istomin (quarterfinals)

Seeds
• # 🇷🇺 Konstantin Kravchuk (qualified)

• # 🇦🇺 Samuel Groth (qualified)

• # 🇷🇺 Alexander Kudryavtsev (qualifying competition)

• # 🇷🇺 Valery Rudnev (qualifying competition)

• # 🇷🇺 Victor Baluda (qualifying competition)

• # 🇷🇺 Mikhail Biryukov (qualified)

• # 🇧🇾 Alexander Bury (qualifying competition)

• # 🇪🇪 Vladimir Ivanov (first round)

Qualifiers
• # 🇷🇺 Konstantin Kravchuk

• # 🇦🇺 Samuel Groth

• # 🇬🇧 Dominic Inglot

• # 🇷🇺 Mikhail Biryukov