The St. Petersburg Open (Russian: Открытый Санкт-Петербург) was a professional men's tennis tournament played on indoor hard courts.

The tournament takes place in mid to late September, following the conclusion of the US Open.

[citation needed] 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.

Five Russian players have won the singles title: Yevgeny Kafelnikov in 1995, Marat Safin in 2000 and 2001, Mikhail Youzhny in 2004, Daniil Medvedev in 2019, and Andrey Rublev in 2020.