# 1981 Campionati Internazionali di Sicilia – Singles

Guillermo Vilas was the defending champion, but did not compete this year.
Manuel Orantes won the title by defeating Pedro Rebolledo 6–4, 6–0, 6–0 in the final.

## Seeds

* Víctor Pecci (first round)
* Wojtek Fibak (quarterfinals)
* Adriano Panatta (first round, retired)
* José Higueras (semifinals)
* José Luis Damiani (second round)
* Ricardo Cano (first round)
* Mario Martínez (quarterfinals)
* Corrado Barazzutti (semifinals)

## 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 | Final | Final | Final | Final |
| | Manuel Orantes | 6 | 6 | | | | |
| 4 | José Higueras | 2 | 3 | | | | |
| 4 | José Higueras | 2 | 3 | Manuel Orantes | 6 | 6 | 6 |
| | | | | Pedro Rebolledo | 4 | 0 | 0 |
| | Pedro Rebolledo | 6 | 7 | Pedro Rebolledo | 4 | 0 | 0 |
| 8 | Corrado Barazzutti | 3 | 6 | | | | |

### 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 |
| 1 | V Pecci | 3 | 6 | 4 | | | | | | | | | | | | | | |
| | J Nyström | 6 | 4 | 6 | | J Nyström | 2 | 1 | | | | | | | | | | |
| | E Iskersky | 6 | 2 | 1 | | A Pierola | 6 | 6 | | | | | | | | | | |
| | A Pierola | 3 | 6 | 6 | | | | | | | A Pierola | 3 | 3 | | | | | |
| | M Orantes | 3 | 6 | 7 | | | | | | | M Orantes | 6 | 6 | | | | | |
| | J Norbäck | 6 | 1 | 5 | | M Orantes | 7 | 3 | 6 | | | | | | | | | |
| | B Prajoux | 4 | 4 | | 5 | JL Damiani | 6 | 6 | 1 | | | | | | | | | |
| 5 | JL Damiani | 6 | 6 | | | | | | | | | | | | | M Orantes | 6 | 6 |
| 4 | J Higueras | 6 | 6 | | | | | | | | | | | | 4 | J Higueras | 2 | 3 |
| | E Adams | 3 | 2 | | 4 | J Higueras | 5 | 6 | 6 | | | | | | | | | |
| | G Tiberti | 1 | 4 | | | J Brown | 7 | 3 | 3 | | | | | | | | | |
| | J Brown | 6 | 6 | | | | | | | 4 | J Higueras | 5 | 6 | 6 | | | | |
| | J Lapidus | 6 | 2 | 7 | | | | | | 7 | M Martínez | 7 | 2 | 1 | | | | |
| | P Bertolucci | 4 | 6 | 5 | | J Lapidus | 1 | 6 | 1 | | | | | | | | | |
| | Ž Franulović | 3 | 7 | 3 | 7 | M Martínez | 6 | 3 | 6 | | | | | | | | | |
| 7 | M Martínez | 6 | 5 | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | R Cano | 6 | 2 | 6 | | | | | | | | | | | | | | |
| | R Chappell | 1 | 6 | 7 | | R Chappell | 2 | 0 | | | | | | | | | | |
| | G Rinaldini | 2 | 3 | | | J Fillol | 6 | 6 | | | | | | | | | | |
| | J Fillol | 6 | 6 | | | | | | | | J Fillol | 4 | 6 | 3 | | | | |
| | P Arraya | 7 | 6 | | | | | | | | P Rebolledo | 6 | 1 | 6 | | | | |
| | M Ostoja | 5 | 3 | | | P Arraya | 4 | 3 | | | | | | | | | | |
| | P Rebolledo | 6 | 3 | | | P Rebolledo | 6 | 6 | | | | | | | | | | |
| 3 | A Panatta | 3 | 0$^r$ | | | | | | | | | | | | | P Rebolledo | 6 | 7 |
| 8 | C Barazzutti | 4 | 6 | 6 | | | | | | | | | | | 8 | C Barazzutti | 3 | 6 |
| | R Benavides | 6 | 4 | 1 | 8 | C Barazzutti | 6 | 7 | | | | | | | | | | |
| | C Castellan | 3 | 6 | 4 | | M Wilander | 1 | 6 | | | | | | | | | | |
| | M Wilander | 6 | 3 | 6 | | | | | | 8 | C Barazzutti | 7 | 6 | | | | | |
| | G Urpí | 2 | 3 | | | | | | | 2 | W Fibak | 5 | 1 | | | | | |
| | J Gurfein | 6 | 6 | | | J Gurfein | 2 | 6 | 1 | | | | | | | | | |
| | D Pérez | 1 | 6 | | 2 | W Fibak | 6 | 3 | 6 | | | | | | | | | |
| 2 | W Fibak | 6 | 7 | | | | | | | | | | | | | | | |