The 1990 KAL Cup Korea Open was a men's tennis tournament played on outdoor hard courts that was part of the World Series of the 1990 ATP Tour. It was the fourth edition of the tournament and was played in Seoul, South Korea from April 16 through April 23, 1990. Unseeded Alex Antonitsch won the singles title.[1]
See main article: 1990 KAL Cup Korea Open – Singles. Alex Antonitsch defeated Pat Cash 7–6, 6–3
See main article: 1990 KAL Cup Korea Open – Doubles. Grant Connell / Glenn Michibata defeated Jason Stoltenberg / Todd Woodbridge 7–6, 6–4