2004 St. Petersburg Open – Singles

Gustavo Kuerten was the defending champion, but did not participate this year.

Mikhail Youzhny won the title, beating Karol Beck 6–2, 6–2 in the final.

Seeds
• # 🇷🇺 Marat Safin (quarterfinals)

• # 🇸🇰 Dominik Hrbatý (first round)

• # 🇺🇸 Mardy Fish (second round)

• # 🇷🇺 Mikhail Youzhny (champion)

• # 🇷🇺 Nikolay Davydenko (second round)

• # 🇪🇸 David Ferrer (first round)

• # 🇫🇷 Michaël Llodra (semifinals)

• # 🇷🇺 Igor Andreev (first round)