1990 Australian Men's Hardcourt Championships – Singles

Mark Woodforde was the defending champion but lost in the first round to Jimmy Arias.

Thomas Muster won in the final 3–6, 6–2, 7–5 against Arias.

Seeds

 * 1) 🇪🇸 Sergi Bruguera (semifinals)
 * 2)  Goran Ivanišević (first round)
 * 3) 🇦🇹 Thomas Muster (champion)
 * 4)  Alexander Volkov (second round)
 * 5) 🇺🇸 Paul Annacone (second round)
 * 6)  Mark Koevermans (quarterfinals)
 * 7)  Michiel Schapers (second round)
 * 8)  Marc Rosset (second round)