1998 International Raiffeisen Grand Prix – Singles

The 1998 International Raiffeisen Grand Prix was a men's tennis tournament played on Clay in St. Pölten, Austria that was part of the International Series of the 1998 ATP Tour. It was the eighteenth edition of the tournament and was held from 18–24 May 1998.

Seeds
Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated. • #🇨🇱 Marcelo Ríos (champion)

• #🇦🇺 Patrick Rafter (first round)

• #🇦🇹 Thomas Muster (quarterfinals)

• #🇮🇹 Andrea Gaudenzi (semifinals)

• #🇫🇷 Guillaume Raoux (first round)

• #🇪🇸 Francisco Clavet (quarterfinals)

• #🇪🇸 Galo Blanco (quarterfinals)

• #🇦🇺 Richard Fromberg (second round)