# 1998 Chevrolet Cup – Singles

Julián Alonso was the defending champion, but lost in the second round this year.
Francisco Clavet won the title, defeating Younes El Aynaoui 6–2, 6–4 in the final.

## Seeds

* Marcelo Ríos (quarterfinals)
* Félix Mantilla (semifinals)
* Alberto Berasategui (second round)
* Gustavo Kuerten (second round)
* Francisco Clavet (champion)
* Mariano Puerta (quarterfinals, retired)
* Dominik Hrbatý (second round)
* Franco Squillari (second round)

## 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 | Final | Final | Final | Final |
| | Juan Antonio Marín | 2 | 5 | | | | |
| 5 | Francisco Clavet | 6 | 7 | | | | |
| 5 | Francisco Clavet | 6 | 7 | 5 | Francisco Clavet | 6 | 6 |
| | | | | | Younes El Aynaoui | 2 | 4 |
| | Younes El Aynaoui | 6 | 6 | | Younes El Aynaoui | 2 | 4 |
| 2 | Félix Mantilla | 4 | 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 |
| 1 | M Ríos | 6 | 1 | 6 | | | | | | | | | | | | | | |
| LL | M Carlsson | 2 | 6 | 3 | 1 | M Ríos | 6 | 6 | | | | | | | | | | |
| | G Cañas | 6 | 3 | 6$^7$ | | M Rodríguez | 2 | 2 | | | | | | | | | | |
| | M Rodríguez | 3 | 6 | 7$^9$ | | | | | | 1 | M Ríos | 4 | 7$^7$ | 5 | | | | |
| | G Pozzi | 6 | 1 | 3 | | | | | | | J A Marín | 6 | 6$^5$ | 7 | | | | |
| | J A Marín | 3 | 6 | 6 | | J A Marín | 6 | 4 | 6 | | | | | | | | | |
| WC | N Massú | 3 | 5 | | 8 | F Squillari | 4 | 6 | 4 | | | | | | | | | |
| 8 | F Squillari | 6 | 7 | | | | | | | | | | | | | J A Marín | 2 | 5 |
| 4 | G Kuerten | 7$^7$ | 4 | 5 | | | | | | | | | | | 5 | F Clavet | 6 | 7 |
| Q | L A Morejon | 6$^5$ | 6 | 7 | 4 | G Kuerten | 6$^3$ | 3 | | | | | | | | | | |
| | N Lapentti | 4 | 6 | 6 | | N Lapentti | 7$^7$ | 6 | | | | | | | | | | |
| | C Costa | 6 | 3 | 3 | | | | | | | N Lapentti | 4 | 4 | | | | | |
| | J Alonso | 5 | | | | | | | | 5 | F Clavet | 6 | 6 | | | | | |
| LL | J A Viloca | 2$^r$ | | | | J Alonso | 1 | 6$^9$ | | | | | | | | | | |
| | R Delgado | 4 | 4 | | 5 | F Clavet | 6 | 7$^{11}$ | | | | | | | | | | |
| 5 | F Clavet | 6 | 6 | | | | | | | | | | | | | | | |

### 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 | M Puerta | 2 | 7$^7$ | 6 | | | | | | | | | | | | | |
| | F Vicente | 6 | 6$^2$ | 3 | 6 | M Puerta | 6 | 7 | | | | | | | | | |
| Q | M Hood | 2 | 6 | 3 | | L Arnold Ker | 3 | 5 | | | | | | | | | |
| | L Arnold Ker | 6 | 3 | 6 | | | | | 6 | M Puerta | 2 | 0$^r$ | | | | | |
| | K Alami | 3 | 4 | | | | | | | Y El Aynaoui | 6 | 1 | | | | | |
| | Y El Aynaoui | 6 | 6 | | | Y El Aynaoui | 7$^7$ | 6 | | | | | | | | | |
| | G Blanco | 1 | 3 | | 3 | A Berasategui | 6$^1$ | 1 | | | | | | | | | |
| 3 | A Berasategui | 6 | 6 | | | | | | | | | | | | Y El Aynaoui | 6 | 6 |
| 7 | D Hrbatý | 7$^7$ | 6 | | | | | | | | | | | 2 | F Mantilla | 4 | 4 |
| Q | A Sá | 6$^3$ | 4 | | 7 | D Hrbatý | 6$^5$ | 4 | | | | | | | | | |
| LL | M Martelli | 6$^2$ | 4 | | WC | J Courier | 7$^7$ | 6 | | | | | | | | | |
| WC | J Courier | 7$^7$ | 6 | | | | | | WC | J Courier | 6 | 3 | 6$^6$ | | | | |
| | F Meligeni | 4 | 6 | 1 | | | | | 2 | F Mantilla | 3 | 6 | 7$^8$ | | | | |
| Q | E Medica | 6 | 1 | 6 | Q | E Medica | 0 | 1 | | | | | | | | | |
| | M Zabaleta | 2 | 3 | | 2 | F Mantilla | 6 | 6 | | | | | | | | | |
| 2 | F Mantilla | 6 | 6 | | | | | | | | | | | | | | |