2019 St. Petersburg Open – Singles

Dominic Thiem was the defending champion, but chose to compete in the Laver Cup instead.

Daniil Medvedev won the title, defeating Borna Ćorić in the final, 6–3, 6–1. Medvedev became the first active player outside the Big Four to reach the final in five consecutive tournaments.

Seeds
The top four seeds receive a bye into the second round. • #🇷🇺 Daniil Medvedev (champion)

• #🇷🇺 Karen Khachanov (second round)

• #🇮🇹 Matteo Berrettini (quarterfinals)

• # Borna Ćorić (final)

• #🇷🇺 Andrey Rublev (quarterfinals)

• #🇰🇿 Mikhail Kukushkin (quarterfinals)

• #🇫🇷 Adrian Mannarino (second round)

• #🇳🇴 Casper Ruud (quarterfinals)

Seeds
• # 🇧🇦 Damir Džumhur (qualifying competition, lucky loser)

• # 🇧🇾 Egor Gerasimov (qualified)

• # Ernests Gulbis (qualifying competition)

• # 🇧🇾 Ilya Ivashka (qualified)

• # 🇨🇿 Lukáš Rosol (qualified)

• # 🇷🇸 Viktor Troicki (withdrew)

• # 🇷🇺 Alexey Vatutin (qualified)

• # 🇮🇹 Matteo Viola (qualifying competition, lucky loser)

Qualifiers
• # 🇨🇿 Lukáš Rosol

• # 🇧🇾 Egor Gerasimov

• # 🇷🇺 Alexey Vatutin

• # 🇧🇾 Ilya Ivashka

Lucky losers
• # 🇧🇦 Damir Džumhur

• # 🇮🇹 Matteo Viola