|St. Petersburg Open|
|Venue||Petersburg Sports and Concert Complex|
|Category||ATP World Series|
ATP International Series
ATP World Tour 250 series
|Surface||Indoor / Carpet|
Indoor / Hard
|Prize money||$1,248,665 (2019)|
|Current champions (2019)|
|Men's singles||Daniil Medvedev|
|Men's doubles|| Divij Sharan|
The St. Petersburg Open (Russian: Открытый Санкт-Петербург) is a professional men's tennis tournament played on indoor hard courts. It is part of the ATP World Tour 250 series of the Association of Tennis Professionals (ATP) World Tour. The tournament was held annually at the Petersburg Sports and Concert Complex in St. Petersburg, Russia, since 1995. The tournament takes place in mid to late September, following the conclusion of the US Open. The singles competition features 28 male competitors, while the doubles one features 16 duo teams. The competition is held on a hard court surface, with a total prize money pool of $1,180,000 USD. This year's tournament (2019) was held between September 15 and September 22.
2002 Australian Open champion Thomas Johansson and former World No. 1s Marat Safin and Andy Murray are the only players to have won the singles titles more than once. To date four different Russian players have won the singles title: Yevgeny Kafelnikov in 1995, Marat Safin in 2000 and 2001, Mikhail Youzhny in 2004, and Daniil Medvedev in 2019.
The event was not held in 2014 but resumed in 2015, now at the Sibur Arena.
The prize pool for this tournament consists of $1,000,000 USD. It is an ATP 250 level tournament, thus the men's singles champion receives 250 ATP ranking points.