1998 Sybase Open – Singles

Pete Sampras was the two-time defending champion, but lost in the final to Andre Agassi, 2–6, 4–6.

Seeds
• # 🇺🇸 Pete Sampras (final)

• # 🇺🇸 Michael Chang (semifinals)

• # 🇧🇷 Gustavo Kuerten (second round)

• # 🇦🇺 Mark Philippoussis (first round)

• # 🇦🇺 Todd Woodbridge (first round)

• # 🇦🇺 Richard Fromberg (first round)

• # 🇩🇪 Tommy Haas (quarterfinals)

• # 🇦🇺 Mark Woodforde (quarterfinals)