1989 Lorraine Open – Singles

Jonas Svensson was the defending champion but did not compete that year.

Guy Forget won in the final 6–3, 7–6 against Michiel Schapers.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.

• # 🇦🇺 Darren Cahill (second round)

• # Ronald Agénor (quarterfinals)

• # 🇫🇷 Guy Forget (champion)

• # 🇸🇪 Jan Gunnarsson (first round)

• # Eric Jelen (first round)

• # 🇺🇸 Richard Matuszewski (first round)

• # Michiel Schapers (final)

• # 🇫🇷 Thierry Tulasne (second round)