The 1998 Adelaide International was a men's ATP tennis tournament played on outdoor hard courts in Adelaide, Australia. The tournament was held from 5 to 12 January. Sixteen-year old Lleyton Hewitt won the first title of his career.
See main article: 1998 Australian Men's Hardcourt Championships – Singles. 
Lleyton Hewitt defeated Jason Stoltenberg, 3–6, 6–3, 7–6(7–4).
See main article: 1998 Australian Men's Hardcourt Championships – Doubles. Joshua Eagle / Andrew Florent defeated Ellis Ferreira / 
Rick Leach, 6–4, 6–7, 6–3.