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

 * 1)  Marcelo Ríos (quarterfinals)
 * 2) 🇪🇸 Félix Mantilla (semifinals)
 * 3) 🇪🇸 Alberto Berasategui (second round)
 * 4) 🇧🇷 Gustavo Kuerten (second round)
 * 5) 🇪🇸 Francisco Clavet (champion)
 * 6) 🇦🇷 Mariano Puerta (quarterfinals, retired)
 * 7) 🇸🇰 Dominik Hrbatý (second round)
 * 8) 🇦🇷 Franco Squillari (second round)