1998 Sydney International
Date	11–17 January
Edition	106th
Surface	Hard / outdoor
Location	Sydney, Australia
Venue	NSW Tennis Centre
Champions
Men's singles
Karol Kučera[1]
Women's singles
Arantxa Sánchez-Vicario[2]
Men's doubles
Todd Woodbridge / Mark Woodforde[1]
Women's doubles
Martina Hingis / Helena Suková[2]
← 1997 · Sydney International · 1999 →

The 1998 Sydney International was a tennis tournament played on outdoor hard courts at the NSW Tennis Centre 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.

Finals

Men's singles

Karol Kučera defeated Tim Henman, 7–5, 6–4.^[1]

• It was Kučera's 1st title of the year and the 3rd of his career.

Women's singles

Arantxa Sánchez-Vicario defeated Venus Williams, 6–1, 6–3.^[2]

• It was Sánchez-Vicario's 1st title of the year and the 81st of her career.

Men's doubles

Todd Woodbridge / Mark Woodforde defeated Jacco Eltingh / Daniel Nestor, 6–3, 7–5.^[1]

• It was Woodbridge's 1st title of the year and the 54th of his career. It was Woodforde's 1st title of the year and the 57th of his career.

Women's doubles

Martina Hingis / Helena Suková defeated Katrina Adams / Meredith McGrath, 6–1, 6–2.^[2]

• It was Hingis' 1st title of the year and the 27th of her career. It was Suková's only title of the year and the 83rd of her career.