The 1990 Campionati Internazionali di Sicilia was a men's tennis tournament played on outdoor clay courts in Palermo, Italy that was part of the World Series of the 1990 ATP Tour. It was the 12th edition of the tournament and took place from 24 September until 30 September 1990. Seventh-seeded Franco Davín won the singles title.
See main article: 1990 Campionati Internazionali di Sicilia – Singles. 
Franco Davín defeated 
Juan Aguilera 6–1, 6–1
See main article: 1990 Campionati Internazionali di Sicilia – Doubles. Sergio Casal / Emilio Sánchez defeated Carlos Costa / Horacio de la Peña 6–3, 6–4