1989 New South Wales Open – Men's singles

John Fitzgerald was the defending champion but did not compete that year.

Aaron Krickstein won in the final 6–4, 6–2 against Andrei Cherkasov.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.


 * 1) 🇫🇷 Henri Leconte (first round)
 * 2)  Andrei Chesnokov (first round)
 * 3) 🇺🇸 Aaron Krickstein (champion)
 * 4) 🇸🇪 Jonas Svensson (first round)
 * 5) 🇦🇺 Darren Cahill (first round)
 * 6)  Christo van Rensburg (quarterfinals)
 * 7) 🇦🇺 Wally Masur (quarterfinals)
 * 8) 🇸🇪 Magnus Gustafsson (second round)