1985 Cologne Cup – Singles

Joakim Nyström was the defending champion, but chose to focus only on the doubles tournament, finishing as runner-up.

Qualifier Peter Lundgren won the title by defeating Ramesh Krishnan 6–3, 6–2 in the final.

Seeds
• # 🇺🇸 Kevin Curren (first round)

• # Miloslav Mečíř (first round)

• # 🇮🇳 Ramesh Krishnan (final)

• # 🇸🇪 Jan Gunnarsson (first round)

• # 🇺🇸 Tim Wilkison (semifinals)

• # 🇺🇸 Larry Stefanki (second round)

• # 🇸🇪 Kent Carlsson (first round)

• # Marián Vajda (first round)