1986 Grand Prix German Open – Singles

Miloslav Mečíř was the defending champion, but lost in the final to Henri Leconte. The score was 6–2, 5–7, 6–4, 6–2. Leconte became the last French player to win the tournament until Gilles Simon won it in 2011.

Seeds
The first eight seeds received a bye to the second round. • # Boris Becker (second round)

• # 🇸🇪 Joakim Nyström (third round)

• # Miloslav Mečíř (final)

• # 🇫🇷 Henri Leconte (champion)

• # 🇪🇨 Andrés Gómez (second round)

• # 🇫🇷 Thierry Tulasne (second round)

• # 🇪🇸 Emilio Sánchez (semifinals)

• # 🇦🇷 Martín Jaite (third round)

• # 🇦🇷 Guillermo Vilas (second round)

• # 🇸🇪 Kent Carlsson (semifinals)

• # Eric Jelen (first round)

• # Jakob Hlasek (quarterfinals)

• # Milan Šrejber (third round)

• # 🇮🇹 Paolo Canè (first round)

• # 🇦🇷 Horacio de la Peña (third round)

• # 🇦🇺 Paul McNamee (second round)