1999 Great American Insurance ATP Championships – Singles
was the defending champion, but lost in the final this year.
Pete Sampras won the title, defeating Rafter 7–6, 6–3 in the final.Seeds
The top eight seeds received a bye to the second round.
- Pete Sampras
- Patrick Rafter '
- Andre Agassi '
- Yevgeny Kafelnikov '
- Tim Henman '
- Gustavo Kuerten '
- Richard Krajicek '
- Álex Corretja '
- Todd Martin '
- Carlos Moyà '
- Tommy Haas '
- Nicolas Kiefer '
- Thomas Enqvist '
- Álbert Costa '
- Nicolás Lapentti '
- Thomas Johansson
Draw
Finals
Section 1
Section 2
Section 3
Section 4