2016 St. Petersburg Open – Singles

Milos Raonic was the defending champion, but lost in the second round to Mikhail Youzhny.

Alexander Zverev won his first ATP title, defeating Stan Wawrinka in the final, 6–2, 3–6, 7–5.

Seeds
The top four seeds receive a bye into the second round. • # Stan Wawrinka (final)

• #🇨🇦 Milos Raonic (second round)

• #🇨🇿 Tomáš Berdych (semifinals)

• #🇪🇸 Roberto Bautista Agut (semifinals)

• #🇩🇪 Alexander Zverev (champion)

• #🇪🇸 Albert Ramos Viñolas (first round)

• #🇷🇸 Viktor Troicki (quarterfinals)

• # João Sousa (quarterfinals)

Seeds
• # 🇲🇩 Radu Albot (qualified)

• # 🇷🇺 Teymuraz Gabashvili (qualifying competition)

• # 🇩🇪 Mischa Zverev (qualified)

• # 🇷🇺 Daniil Medvedev (qualified)

• # 🇷🇺 Alexander Kudryavtsev (qualifying competition)

• # 🇬🇧 James Ward (first round)

• # 🇫🇷 Alexandre Sidorenko (qualified)

• # 🇨🇿 Jan Mertl (qualifying competition)

Qualifiers
• # 🇲🇩 Radu Albot

• # 🇫🇷 Alexandre Sidorenko

• # 🇩🇪 Mischa Zverev

• # 🇷🇺 Daniil Medvedev