# 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)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Pete Sampras | 6 | 2 | 6 | | | | |
| Q | John van Lottum | 3 | 6 | 2 | | | | |
| Q | John van Lottum | 3 | 6 | 2 | 1 | Pete Sampras | 2 | 4 |
| | | | | | WC | Andre Agassi | 6 | 6 |
| WC | Andre Agassi | 6 | 7$^7$ | | WC | Andre Agassi | 6 | 6 |
| 2 | Michael Chang | 4 | 6$^4$ | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | P Sampras | 6 | 6 | | | | | | | | | | | | | | | | |
| | J Stark | 3 | 4 | | 1 | P Sampras | 6 | 7$^7$ | | | | | | | | | | | |
| | A Gaudenzi | 3 | 1 | | | J Burillo | 3 | 6$^2$ | | | | | | | | | | | |
| | J Burillo | 6 | 6 | | | | | | | 1 | P Sampras | 6 | 6 | | | | | | |
| WC | M Washington | 7 | 6 | | | | | | | 8 | M Woodforde | 0 | 2 | | | | | | |
| | R Delgado | 5 | 2 | | WC | M Washington | 5 | 5 | | | | | | | | | | | |
| | W Black | 7$^8$ | 2 | 4 | 8 | M Woodforde | 7 | 7 | | | | | | | | | | | |
| 8 | M Woodforde | 6$^6$ | 6 | 6 | | | | | | | | | | | 1 | P Sampras | 6 | 2 | 6 |
| 4/WC | M Philippoussis | 4 | 3 | | | | | | | | | | | | Q | J van Lottum | 3 | 6 | 2 |
| | V Spadea | 6 | 6 | | | V Spadea | 5 | 7$^7$ | 2 | | | | | | | | | | |
| Q | J van Lottum | 6 | 4 | 6 | Q | J van Lottum | 7 | 6$^2$ | 6 | | | | | | | | | | |
| | A O'Brien | 3 | 6 | 2 | | | | | | Q | J van Lottum | 2 | 6 | 7$^{10}$ | | | | | |
| | E Benfele Álvarez | 6$^1$ | 5 | | | | | | | | T Martin | 6 | 4 | 6$^8$ | | | | | |
| Q | J Oncins | 7$^7$ | 7 | | Q | J Oncins | 3 | 6$^3$ | | | | | | | | | | | |
| | T Martin | 6 | 7 | | | T Martin | 6 | 7$^7$ | | | | | | | | | | | |
| 5 | T Woodbridge | 4 | 5 | | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | R Fromberg | 7$^7$ | 2 | 4 | | | | | | | | | | | | | |
| | T Nydahl | 6$^5$ | 6 | 6 | | T Nydahl | 4 | 6$^1$ | | | | | | | | | |
| | S Sargsian | 3 | 6 | 4 | Q | J-M Gambill | 6 | 7$^7$ | | | | | | | | | |
| Q | J-M Gambill | 6 | 1 | 6 | | | | | Q | J-M Gambill | 5 | 6$^7$ | | | | | |
| WC | A Agassi | 6 | 6 | | | | | | WC | A Agassi | 7 | 7$^9$ | | | | | |
| | A Martín | 2 | 2 | | WC | A Agassi | 6 | 6 | | | | | | | | | |
| | J Gimelstob | 6$^5$ | 6 | 1 | 3 | G Kuerten | 3 | 1 | | | | | | | | | |
| 3 | G Kuerten | 7$^7$ | 4 | 6 | | | | | | | | | | WC | A Agassi | 6 | 7$^7$ |
| 7 | T Haas | 6 | 6 | | | | | | | | | | | 2 | M Chang | 4 | 6$^4$ |
| | JA Viloca-Puig | 1 | 4 | | 7 | T Haas | 6 | 6 | | | | | | | | | |
| | R Reneberg | 4 | 2 | | | G Stafford | 2 | 3 | | | | | | | | | |
| | G Stafford | 6 | 6 | | | | | | 7 | T Haas | 3 | 7$^7$ | 4 | | | | |
| Q | G Bastl | 6 | 2 | 6 | | | | | 2 | M Chang | 6 | 6$^3$ | 6 | | | | |
| | F Meligeni | 1 | 6 | 3 | Q | G Bastl | 5 | 3 | | | | | | | | | |
| | M Craca | 2 | 4 | | 2 | M Chang | 7 | 6 | | | | | | | | | |
| 2 | M Chang | 6 | 6 | | | | | | | | | | | | | | |