The 1998 Campionati Internazionali di San Marino was a men's tennis tournament played on outdoor clay courts in City of San Marino, San Marino that was part of the World Series of the 1998 ATP Tour. It was the tenth edition of the tournament and was held from 10 August until 16 August 1998. Third-seeded Dominik Hrbatý won the singles titles.
Dominik Hrbatý defeated Mariano Puerta, 6âÂÂ2, 7âÂÂ5
Jià ÂàNovák / David Rikl defeated Mariano Hood / Sebastián Prieto, 6âÂÂ4, 7âÂÂ6