1990 Philips Open – Singles

Andrei Chesnokov was the defending champion, but lost in the second round to Fabrice Santoro.

Juan Aguilera won the title by defeating Guy Forget 2–6, 6–3, 6–4 in the final.

Seeds
• # 🇺🇸 Jay Berger (quarterfinals)

• # 🇦🇷 Alberto Mancini (first round)

• # 🇦🇹 Horst Skoff (first round)

• # Andrei Chesnokov (second round)

• # 🇫🇷 Yannick Noah (first round)

• # 🇦🇷 Guillermo Pérez Roldán (second round, retired)

• # Petr Korda (first round)

• # 🇪🇸 Jordi Arrese (first round)