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. Lleyton Hewitt won his first title of the year and the 1st of his career.

Lleyton Hewitt defeated Jason Stoltenberg, 3–6, 6–3, 7–6^(7–4).

Joshua Eagle / Andrew Florent defeated Ellis Ferreira / Rick Leach, 6–4, 6–7, 6–3.

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