The 1998 Italian Open was a tennis tournament played on outdoor clay courts. It was the 57th edition of the Rome Masters and was part of the Super 9 of the 1998 ATP Tour and of Tier I of the 1998 WTA Tour. Both the men's and women's events took place at the Foro Italico in Rome in Italy. The women's tournament was played from 4 to 10 May 1998; the men's tournament was played from 11 to 17 May 1998.
See main article: 1998 Italian Open – Men's singles. Marcelo Ríos defeated Albert Costa by walkover.
See main article: 1998 Italian Open – Women's singles. Martina Hingis defeated Venus Williams, 6–3, 2–6, 6–3.
See main article: 1998 Italian Open – Men's doubles. Mahesh Bhupathi / Leander Paes defeated Ellis Ferreira / Rick Leach, 6–4, 4–6, 7–6.
See main article: 1998 Italian Open – Women's doubles. Virginia Ruano Pascual / Paola Suárez defeated Amanda Coetzer / Arantxa Sánchez-Vicario, 7–6(7–1), 6–4.