Champion Stefan Edberg Final score 6–3, 2–6, 6–4 men women | Runner-up Ivan Lendl Singles men Doubles men | |
John McEnroe was the defending champion but lost in the semifinals to Stefan Edberg.
Edberg won in the final 6–3, 2–6, 6–4 against Ivan Lendl.
Seeds
The top eight seeds received a bye to the second round.
References
1989 Suntory Japan Open Tennis Championships – Men's Singles Wikipedia(Text) CC BY-SA