1989 Czechoslovak Open – Singles

Thomas Muster was the defending champion, but did not compete this year.

Marcelo Filippini won the title by defeating Horst Skoff 7–5, 7–6 in the final.

Seeds
• # 🇪🇸 Jordi Arrese (second round)

• # 🇦🇹 Horst Skoff (final)

• # Karel Nováček (first round)

• # Marcelo Filippini (champion)

• # Martin Střelba (quarterfinals)

• # 🇦🇷 Eduardo Bengoechea (second round)

• # 🇪🇸 Fernando Luna (first round)

• # 🇺🇸 Lawson Duncan (first round)