The 1998 Sydney International was a tennis tournament played on outdoor hard courts at the White City Stadium in Sydney, Australia that was part of the International Series of the 1998 ATP Tour and of Tier II of the 1998 WTA Tour. The tournament was held from 11 through 17 January 1998.
See main article: 1998 Sydney International – Men's singles. Karol Kučera defeated Tim Henman, 7–5, 6–4.
See main article: 1998 Sydney International – Women's singles. Arantxa Sánchez-Vicario defeated Venus Williams, 6–1, 6–3.
See main article: 1998 Sydney International – Men's doubles. Todd Woodbridge / Mark Woodforde defeated Jacco Eltingh / Daniel Nestor, 6–3, 7–5.
See main article: 1998 Sydney International – Women's doubles. Martina Hingis / Helena Suková defeated Katrina Adams / Meredith McGrath, 6–1, 6–2.