1998 Heineken Open – Singles

First-seeded Marcelo Ríos defeated Richard Fromberg 4–6, 6–4, 7–6(7–3) to win the 1998 Heineken Open singles competition. Jonas Björkman was the champion but did not defend his title.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.


 * 1)  Marcelo Ríos (champion)
 * 2) 🇪🇸 Félix Mantilla (semifinals)
 * 3) 🇸🇰 Dominik Hrbatý (quarterfinals)
 * 4)  Marcelo Filippini (first round)
 * 5) 🇺🇸 Jeff Tarango (second round)
 * 6) 🇳🇿 Brett Steven (second round)
 * 7) 🇨🇿 Daniel Vacek (first round)
 * 8) 🇪🇸 Javier Sánchez (second round)