The 2020 St. Petersburg Open is a tennis tournament played on indoor hard courts that is part of the 2020 ATP Tour.

It is the 25th edition of the St. Petersburg Open.

The tournament was originally scheduled to take place from September 21 to 27, 2020, but was moved to October 12–18, and,[1] since the ongoing COVID-19 pandemic caused many tournaments to be cancelled,[2] upgraded to ATP 500 level for this one year.

[3] It is taking place at the Sibur Arena in Saint Petersburg, Russia.

[1] The following players received wildcards into the singles main draw: The following player received entry using a protected ranking into the singles main draw: The following players received entry from the qualifying draw: The following players received entry as a lucky loser: The following pairs received wildcards into the doubles main draw: The following pair received entry from the qualifying draw: The following pair received entry as lucky losers: