2005 St. Petersburg Open – Singles

Mikhail Youzhny was the defending champion, but lost in the quarterfinals this year.

Thomas Johansson won the title, beating Nicolas Kiefer 6–4, 6–2 in the final.

Seeds
• # 🇷🇺 Nikolay Davydenko (quarterfinals)

• # 🇸🇪 Thomas Johansson (champion)

• # 🇧🇾 Max Mirnyi (first round)

• # 🇷🇺 Mikhail Youzhny (quarterfinals)

• # 🇩🇪 Nicolas Kiefer (final)

• # 🇫🇮 Jarkko Nieminen (first round)

• # 🇬🇧 Greg Rusedski (quarterfinals)

• # 🇪🇸 Fernando Verdasco (semifinals)