1998 Sybase Open
Date	February 9–15
Edition	110th
Category	ATP World Series
Draw	32S / 16D
Prize money	$315,000
Surface	Hard / Indoor
Location	San Jose, U.S.
Venue	San Jose Arena
Champions
Singles
Andre Agassi[1]
Doubles
Mark Woodforde / Todd Woodbridge[2]
← 1997 · Pacific Coast Championships · 1999 →

The 1998 Sybase Open was a men's tennis tournament played on indoor hard courts at the San Jose Arena in San Jose, California in the United States and was part of the ATP World Series of the 1998 ATP Tour. It was the 110th edition of the tournament ran from February 9 through February 15, 1998. Unseeded wildcard-entry Andre Agassi won the singles title.^[3]

Finals

Singles

Andre Agassi defeated Pete Sampras 6–2, 6–4

• It was Agassi's first title of the year and the 35th of his career.

Doubles

Mark Woodforde / Todd Woodbridge defeated Nelson Aerts / André Sá 6–1, 7–5

• It was Woodforde's second title of the year and the 54th of his career. It was Woodbridge's second title of the year and the 53rd of his career.