1989 Seoul Open – Singles

Dan Goldie was the defending champion but did not compete that year.

Robert Van't Hof won in the final 7–5, 6–4 against Brad Drewett.

Seeds

 * 1) 🇦🇺 John Fitzgerald (semifinals)
 * 2) 🇳🇿 Kelly Evernden (semifinals)
 * 3) 🇺🇸 Scott Davis (first round)
 * 4) 🇫🇮 Olli Rahnasto (first round)
 * 5) 🇺🇸 Glenn Layendecker (first round)
 * 6) 🇦🇺 Brad Drewett (final)
 * 7) 🇺🇸 Paul Chamberlin (quarterfinals)
 * 8)  Christian Saceanu (first round)