1990 Philips Austrian Open – Singles

Emilio Sánchez was the defending champion, but lost in the semifinal to Horacio de la Peña.

De la Peña won the title, by defeating Karel Nováček 6–4, 7–6(7–4), 2–6, 6–2 in the final.

Seeds
All seeds received a bye to the second round. • # Boris Becker (quarterfinals)

• # 🇺🇸 Brad Gilbert (second round)

• # 🇪🇸 Emilio Sánchez (semifinals)

• # 🇦🇹 Thomas Muster (quarterfinals)

• # Marc Rosset (third round)

• # 🇦🇹 Horst Skoff (semifinals)

• # Karel Nováček (final)

• # 🇪🇸 Sergi Bruguera (quarterfinals)

• # 🇪🇸 Javier Sánchez (third round)

• # 🇦🇹 Alex Antonitsch (third round)

• # Andrei Cherkasov (quarterfinals)

• # 🇪🇸 Tomás Carbonell (third round)

• # Udo Riglewski (third round)

• # Marián Vajda (third round)

• # Martin Střelba (third round)

• # 🇸🇪 David Engel (third round)