St. Petersburg 2018
Dominic Thiem won the title, beating Martin Klizan 6–3 6–1 in the final.
Main draw 28 players
- 1🇦🇹Dominic ThiemFinal · Champion
- 2🇮🇹Fabio FogniniRound of 16 · Lost to Martin Klizan
- 3🇮🇹Marco Cecchinato#173Quarterfinals · Lost to Roberto Bautista Agut
- 4🇷🇺Karen Khachanov#24Round of 16 · Lost to Stan Wawrinka
- 5🇪🇸Roberto Bautista Agut#239Semifinals · Lost to Dominic Thiem
- 6🇧🇦Damir Dzumhur#90Quarterfinals · Lost to Stan Wawrinka
- 7🇨🇦Denis Shapovalov#50Quarterfinals · Lost to Martin Klizan
- 8🇷🇺Daniil Medvedev#5Quarterfinals · Lost to Dominic Thiem
- 🇸🇰Martin KlizanFinal · Lost to Dominic Thiem
- WC🇨🇭Stan Wawrinka#164Semifinals · Lost to Martin Klizan
- 🇦🇷Guido PellaRound of 16 · Lost to Damir Dzumhur
- 🇩🇪Jan-Lennard Struff#37Round of 16 · Lost to Dominic Thiem
- 🇸🇰Lukas LackoRound of 16 · Lost to Marco Cecchinato
- 🇮🇹Matteo Berrettini#43Round of 16 · Lost to Denis Shapovalov
- 🇰🇿Mikhail Kukushkin#344Round of 16 · Lost to Daniil Medvedev
- WC🇷🇺Mikhail YouzhnyRound of 16 · Lost to Roberto Bautista Agut
- Q🇪🇸Adrian Menendez MaceirasRound of 32 · Lost to Denis Shapovalov
- 🇸🇮Aljaz BedeneRound of 32 · Lost to Stan Wawrinka
- 🇷🇺Andrey Rublev#23Round of 32 · Lost to Jan-Lennard Struff
- 🇺🇿Denis IstominRound of 32 · Lost to Mikhail Kukushkin
- 🇷🇺Evgeny DonskoyRound of 32 · Lost to Martin Klizan
- 🇪🇸Guillermo Garcia LopezRound of 32 · Lost to Matteo Berrettini
- Q🇧🇾Ilya Ivashka#223Round of 32 · Lost to Guido Pella
- 🇵🇹Joao SousaRound of 32 · Lost to Daniil Medvedev
- Q🇮🇹Luca VanniRound of 32 · Lost to Roberto Bautista Agut
- Q🇦🇹Lucas MiedlerRound of 32 · Lost to Damir Dzumhur
- 🇧🇦Mirza BasicRound of 32 · Lost to Mikhail Youzhny
- LL🇧🇪Ruben BemelmansRound of 32 · Lost to Lukas Lacko