1991 Australian Indoor Championships – Singles

Boris Becker was the defending champion but did not compete that year.

Stefan Edberg won in the final 6–2, 6–2, 6–2 against Brad Gilbert.

Seeds
All sixteen seeds received a bye to the second round.


 * 1) 🇸🇪 Stefan Edberg (champion)
 * 2)  Ivan Lendl (third round)
 * 3) 🇺🇸 Pete Sampras (semifinals)
 * 4) 🇺🇸 Andre Agassi (quarterfinals)
 * 5) 🇺🇸 David Wheaton (quarterfinals)
 * 6)  Goran Ivanišević (semifinals)
 * 7) 🇺🇸 Derrick Rostagno (second round)
 * 8) 🇺🇸 Michael Chang (quarterfinals)
 * 9) 🇺🇸 Brad Gilbert (final)
 * 10)  Andrei Chesnokov (second round)
 * 11) 🇺🇸 Richey Reneberg (third round)
 * 12) 🇺🇸 Aaron Krickstein (second round)
 * 13) 🇦🇺 Todd Woodbridge (third round)
 * 14) 🇺🇸 MaliVai Washington (third round)
 * 15) 🇦🇺 Wally Masur (second round)
 * 16)  Wayne Ferreira (quarterfinals)