2016 St. Petersburg Open

The 2016 St. Petersburg Open was a tennis tournament played on indoor hard courts. It was the 21st edition of the St. Petersburg Open, and part of the ATP World Tour 250 Series of the 2016 ATP World Tour. It took place at the Sibur Arena in Saint Petersburg, Russia, from 19 September through 25 September 2016. Fifth-seeded Alexander Zverev won the singles title.

Singles

 * 🇩🇪 Alexander Zverev defeated Stan Wawrinka, 6–2, 3–6, 7–5

Doubles

 * 🇬🇧 Dominic Inglot / 🇫🇮 Henri Kontinen defeated 🇩🇪 Andre Begemann / 🇮🇳 Leander Paes, 4–6, 6–3, [12–10]

Seeds

 * 1 Rankings are as of September 12, 2016

Other entrants
The following players received wildcards into the singles main draw:
 * 🇷🇺 Alexander Bublik
 * 🇷🇺 Karen Khachanov
 * 🇷🇺 Andrey Rublev

The following player received entry using a protected ranking:
 * 🇷🇸 Janko Tipsarević

The following players received entry from the qualifying draw:
 * 🇲🇩 Radu Albot
 * 🇷🇺 Daniil Medvedev
 * 🇫🇷 Alexandre Sidorenko
 * 🇩🇪 Mischa Zverev

Withdrawals

 * Before the tournament
 * 🇨🇾 Marcos Baghdatis →replaced by 🇷🇺 Evgeny Donskoy
 * 🇪🇸 Pablo Carreño Busta →replaced by 🇨🇿 Lukáš Rosol
 * Ernests Gulbis →replaced by 🇷🇸 Dušan Lajović
 * 🇨🇿 Jiří Veselý →replaced by 🇱🇹 Ričardas Berankis

Retirements

 * 🇰🇿 Mikhail Kukushkin

Seeds

 * Rankings are as of September 12, 2016

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇷🇺 Alexander Bublik / 🇷🇺 Evgeny Donskoy
 * 🇷🇺 Mikhail Elgin / 🇷🇺 Alexander Kudryavtsev