The 1999 AAPT Championships was a men's ATP tennis tournament held in Adelaide, Australia and played on outdoor hardcourts. It was the 22nd edition of the tournament and was held from 4 to 11 January. Second-seeded Thomas Enqvist won his first title of the year and the 15th of his career.
See main article: 1999 AAPT Championships – Singles. 
Thomas Enqvist defeated 
Lleyton Hewitt 4–6, 6–1, 6–2
See main article: 1999 AAPT Championships – Doubles. 
Gustavo Kuerten / 
Nicolás Lapentti defeated 
Jim Courier / Patrick Galbraith 6–4, 6–4