1989 Dutch Open – Singles

Emilio Sánchez was the defending champion, but finished runner-up this year.

Karel Nováček won the tournament, beating Sánchez in the final, 6–2, 6–4.

Seeds

 * 1) 🇸🇪 Kent Carlsson (first round)
 * 2) 🇪🇸 Emilio Sánchez (final)
 * 3)  Andrei Chesnokov (quarterfinals)
 * 4) 🇦🇹 Horst Skoff (quarterfinals)
 * 5) 🇮🇹 Paolo Canè (semifinals)
 * 6) N/A
 * 7) 🇪🇸 Javier Sánchez (second round)
 * 8)  Karel Nováček (champion)