2003 Kremlin Cup – Men's singles

Paul-Henri Mathieu was the defending champion but lost in the semifinals to Taylor Dent.

Dent won in the final 7–6(7–5), 6–4 against Sargis Sargsian.

Seeds
• # Sjeng Schalken (first round)

• # 🇦🇷 Agustín Calleri (quarterfinals)

• # 🇪🇸 Félix Mantilla (first round)

• # 🇷🇺 Marat Safin (first round)

• # 🇧🇾 Max Mirnyi (second round)

• # Nicolás Massú (first round)

• # 🇪🇸 Feliciano López (first round)

• # 🇷🇺 Yevgeny Kafelnikov (second round)

Seeds
• # Marc Rosset (moved into Main Draw)

• # 🇨🇿 Tomáš Zíb (qualified)

• # 🇫🇮 Tuomas Ketola (qualified)

• # 🇩🇪 David Prinosil (qualified)

• # 🇨🇿 Robin Vik (qualifying competition)

• # 🇩🇪 Christian Vinck (qualifying competition)

• # 🇷🇺 Dmitri Sitak (first round)

• # 🇷🇺 Pavel Ivanov (second round)

Qualifiers
• # Wayne Black

• # 🇨🇿 Tomáš Zíb

• # 🇫🇮 Tuomas Ketola

• # 🇩🇪 David Prinosil