1990 KAL Cup Korea Open – Singles

Robert Van't Hof was the defending champion, but did not participate this year.

Alex Antonitsch won the tournament, beating Pat Cash in the final, 7–6, 6–3.

Seeds
• # 🇦🇺 Wally Masur (second round)

• # 🇮🇱 Amos Mansdorf (first round)

• # 🇺🇸 Paul Chamberlin (first round)

• # 🇳🇿 Kelly Evernden (second round)

• # Milan Šrejber (quarterfinals)

• # 🇺🇸 Dan Goldie (semifinals)

• # 🇸🇪 Thomas Högstedt (first round)

• # 🇮🇱 Gilad Bloom (semifinals)