# 1990 Campionati Internazionali di Sicilia – Singles

Guillermo Pérez Roldán was the defending champion, but lost in the semifinals to tournament runner-up Juan Aguilera.
Franco Davín won the title by defeating Aguilera 6–1, 6–1 in the final.

## Seeds

* Emilio Sánchez (first round)
* Guillermo Pérez Roldán (semifinals)
* Juan Aguilera (final)
* Horst Skoff (first round)
* Sergi Bruguera (first round)
* Omar Camporese (second round)
* Franco Davín (champion)
* Goran Prpić (second round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 7 | Franco Davín | 6 | 4 | 7 | | | | |
| | Thierry Champion | 1 | 6 | 5 | | | | |
| | Thierry Champion | 1 | 6 | 5 | 7 | Franco Davín | 6 | 6 |
| | | | | | 3 | Juan Aguilera | 1 | 1 |
| 3 | Juan Aguilera | 6 | 6 | | 3 | Juan Aguilera | 1 | 1 |
| 2 | Guillermo Pérez Roldán | 2 | 3 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | E Sánchez | 6 | 4 | | | | | | | | | | | | | | | | |
| | T Benhabiles | 7 | 6 | | | T Benhabiles | 2 | 6 | 5$^r$ | | | | | | | | | | |
| | M Střelba | 6 | 6 | | | M Střelba | 6 | 4 | 6 | | | | | | | | | | |
| WC | S Casal | 4 | 1 | | | | | | | | M Střelba | 2 | 4 | | | | | | |
| | P Canè | 3 | 6 | 6 | | | | | | 7 | F Davín | 6 | 6 | | | | | | |
| | D Pérez | 6 | 4 | 2 | | P Canè | 3 | 4 | | | | | | | | | | | |
| Q | A de Minicis | 4 | 1 | | 7 | F Davín | 6 | 6 | | | | | | | | | | | |
| 7 | F Davín | 6 | 6 | | | | | | | | | | | | 7 | F Davín | 6 | 4 | 7 |
| 3 | H Skoff | 6 | 6 | 1 | | | | | | | | | | | | T Champion | 1 | 6 | 5 |
| | F Clavet | 3 | 7 | 6 | | F Clavet | 4 | 2 | | | | | | | | | | | |
| | T Champion | 6 | 6 | | | T Champion | 6 | 6 | | | | | | | | | | | |
| | R Azar | 3 | 3 | | | | | | | | T Champion | 6$^4$ | 6 | 6 | | | | | |
| | E Masso | 3 | 0$^r$ | | | | | | | | H de la Peña | 7$^7$ | 1 | 3 | | | | | |
| | H de la Peña | 6 | 3 | | | H de la Peña | 6 | 6 | | | | | | | | | | | |
| Q | MA Górriz | 4 | 4 | | 6 | O Camporese | 4 | 4 | | | | | | | | | | | |
| 6 | O Camporese | 6 | 6 | | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | S Bruguera | 7 | 2 | 4 | | | | | | | | | | | | | |
| | C Pistolesi | 5 | 6 | 6 | | C Pistolesi | 6 | 6 | | | | | | | | | |
| | A Gaudenzi | 6 | 4 | | | R Furlan | 2 | 4 | | | | | | | | | |
| | R Furlan | 7 | 6 | | | | | | | | C Pistolesi | 4 | 4 | | | | |
| | J Sánchez | 6 | 6 | | | | | | | 3 | J Aguilera | 6 | 6 | | | | |
| | J Wöhrmann | 3 | 4 | | | J Sánchez | 6 | 4 | | | | | | | | | |
| | S Pescosolido | 3 | 6 | 1$^r$ | 3 | J Aguilera | 7 | 6 | | | | | | | | | |
| 3 | J Aguilera | 6 | 4 | 3 | | | | | | | | | | 3 | J Aguilera | 6 | 6 |
| 8 | G Prpić | 6 | 6 | | | | | | | | | | | 2 | G Pérez Roldán | 2 | 3 |
| Q | F Mordegan | 0 | 3 | | 8 | G Prpić | 6 | 6 | 2 | | | | | | | | |
| Q | C Allgårdh | 1 | 3 | | | M Vajda | 7 | 3 | 6 | | | | | | | | |
| | M Vajda | 6 | 6 | | | | | | | | M Vajda | 4 | 6 | | | | |
| | T Carbonell | 6 | 6 | | | | | | | 2 | G Pérez Roldán | 6 | 7 | | | | |
| | L Duncan | 3 | 2 | | | T Carbonell | 6 | 4 | | | | | | | | | |
| | J Tarango | 1 | 2 | | 2 | G Pérez Roldán | 7 | 6 | | | | | | | | | |
| 2 | G Pérez Roldán | 6 | 6 | | | | | | | | | | | | | | |