The 2009 St. Petersburg Open was a tennis tournament played on indoor hard courts. It was the 15th edition of the St. Petersburg Open, and was part of the ATP World Tour 250 Series of the 2009 ATP World Tour. It was held at the Petersburg Sports and Concert Complex in Saint Petersburg, Russia, from October 25 through November 1, 2009.

ATP entrants

Seeds

Other entrants

The following players received wildcards into the singles main draw: The following players received into the singles main draw as special exempt: The following players received entry from the qualifying draw:

Finals

Singles

🇺🇦 Sergiy Stakhovsky defeated 🇦🇷 Horacio Zeballos 2–6, 7–6(10–8), 7–6(9–7)

Doubles

🇬🇧 Colin Fleming / 🇬🇧 Ken Skupski defeated 🇫🇷 Jérémy Chardy / 🇫🇷 Richard Gasquet, 2–6, 7–5, [10–4]