2012 St. Petersburg Open

The 2012 St. Petersburg Open was a tennis tournament played on indoor hard courts. It was the 17th edition of the St. Petersburg Open, and part of the ATP World Tour 250 Series of the 2012 ATP World Tour. It took place at the Petersburg Sports and Concert Complex in Saint Petersburg, Russia, from 17 September through 23 September 2012. Third-seeded Martin Kližan won the singles title.

Seeds

 * 1 Seeds are based on the rankings of September 10, 2012

Other entrants
The following players received wildcards into the singles main draw:
 * 🇷🇺 Evgeny Donskoy
 * 🇷🇺 Mikhail Elgin
 * 🇷🇺 Teymuraz Gabashvili

The following players received entry from the qualifying draw:
 * 🇧🇾 Sergey Betov
 * 🇧🇾 Nikolai Fidirko
 * 🇷🇺 Andrey Kumantsov
 * 🇧🇾 Andrei Vasilevski

The following players received entry as lucky loser:
 * 🇷🇺 Ivan Nedelko

Withdrawals

 * 🇷🇺 Igor Andreev (right shoulder injury)
 * 🇪🇸 Pablo Andújar
 * Aljaž Bedene
 * Blaž Kavčič
 * 🇰🇿 Mikhail Kukushkin

Retirements

 * 🇷🇺 Andrey Kumantsov (dizziness)
 * 🇮🇹 Paolo Lorenzi (left Achilles tendon injury)
 * 🇩🇪 Philipp Petzschner (knee injury)
 * 🇪🇪 Jürgen Zopp (back injury)

Seeds

 * Rankings are as of September 10, 2012

Other entrants
The following pairs received wildcards into the doubles main draw:
 * Ričardas Berankis / 🇷🇺 Nikita Gudozhnikov
 * 🇷🇺 Andrey Yakovlev / 🇷🇺 Alexander Zhurbin

Singles
🇸🇰 Martin Kližan defeated 🇮🇹 Fabio Fognini, 6–2, 6–3 It was Kližan's first title on the ATP World Tour.

Doubles

 * 🇺🇸 Rajeev Ram / 🇷🇸 Nenad Zimonjić defeated 🇸🇰 Lukáš Lacko / 🇸🇰 Igor Zelenay 6–2, 4–6, [10–6]