# 1989 Bologna Open – Singles

Alberto Mancini was the defending champion, but did not compete this year.
Javier Sánchez won the title by defeating Franco Davín 6–1, 6–0 in the final.

## Seeds

* Guillermo Pérez Roldán (semifinals)
* Jonas Svensson (first round)
* Horst Skoff (second round)
* Ronald Agénor (quarterfinals)
* Marcelo Filippini (first round)
* Javier Sánchez (champion)
* Omar Camporese (quarterfinals)
* Mark Koevermans (first 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 | Final | Final | Final | Final |
| 1/WC | Guillermo Pérez Roldán | 5 | 1 | | | | |
| 6 | Javier Sánchez | 7 | 6 | | | | |
| 6 | Javier Sánchez | 7 | 6 | 6 | Javier Sánchez | 6 | 6 |
| | | | | | Franco Davín | 1 | 0 |
| | Roberto Azar | 3 | 3 | | Franco Davín | 1 | 0 |
| | Franco Davín | 6 | 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/WC | G Pérez Roldán | 6 | 6 | | | | | | | | | | | | | | | |
| | T Nydahl | 2 | 2 | | 1/WC | G Pérez Roldán | 6 | 6 | | | | | | | | | | |
| Q | G Markus | 6 | 6 | | Q | G Markus | 3 | 3 | | | | | | | | | | |
| WC | S Pescosolido | 3 | 4 | | | | | | | 1/WC | G Pérez Roldán | 7 | 4 | 6 | | | | |
| | C Allgårdh | 1 | 0 | | | | | | | 7 | O Camporese | 5 | 6 | 4 | | | | |
| | C Mezzadri | 6 | 6 | | | C Mezzadri | 6 | 6 | 4 | | | | | | | | | |
| | C Panatta | 0 | 2 | | 7 | O Camporese | 3 | 7 | 6 | | | | | | | | | |
| 7 | O Camporese | 6 | 6 | | | | | | | | | | | | 1/WC | G Pérez Roldán | 5 | 1 |
| 3 | H Skoff | 6 | 3 | 7 | | | | | | | | | | | 6 | J Sánchez | 7 | 6 |
| | M Cierro | 3 | 6 | 5 | 3 | H Skoff | 5 | 4 | | | | | | | | | | |
| LL | M Larsson | 4 | 4 | | | D Pérez | 7 | 6 | | | | | | | | | | |
| | D Pérez | 6 | 6 | | | | | | | | D Pérez | 3 | 6 | 5 | | | | |
| | S Colombo | 1 | 6 | 6 | | | | | | 6 | J Sánchez | 6 | 2 | 7 | | | | |
| | J Windahl | 6 | 1 | 3 | | S Colombo | 3 | 2 | | | | | | | | | | |
| | P Rebolledo | 2 | 0 | | 6 | J Sánchez | 6 | 6 | | | | | | | | | | |
| 6 | J Sánchez | 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 |
| 5 | M Filippini | 6 | 5 | 6 | | | | | | | | | | | | |
| | R Azar | 3 | 7 | 7 | | R Azar | 6 | 6 | | | | | | | | |
| Q | E Mazza | 4 | 1 | | | A Võsand | 3 | 2 | | | | | | | | |
| | A Võsand | 6 | 6 | | | | | | | | R Azar | 7 | 6 | | | |
| | F Cancellotti | 3 | 7 | 4 | | | | | | 4/WC | R Agénor | 6 | 1 | | | |
| | R Viver | 6 | 5 | 6 | | R Viver | 4 | 1 | | | | | | | | |
| | T Carbonell | 6 | 5 | | 4/WC | R Agénor | 6 | 6 | | | | | | | | |
| 4/WC | R Agénor | 7 | 7 | | | | | | | | | | | R Azar | 3 | 3 |
| 8 | M Koevermans | 4 | 2 | | | | | | | | | | | F Davín | 6 | 6 |
| | F Davín | 6 | 6 | | | F Davín | 7 | 6 | | | | | | | | |
| Q | F Rivera | 7 | 4 | 3 | | M Narducci | 6 | 1 | | | | | | | | |
| | M Narducci | 6 | 6 | 6 | | | | | | | F Davín | 6 | 6 | | | |
| | A Aramburú | 4 | 6 | 5 | | | | | | Q | P Pambianco | 4 | 3 | | | |
| Q | P Pambianco | 6 | 1 | 7 | Q | P Pambianco | 2 | 6 | 6 | | | | | | | |
| | S Casal | 7 | 6 | | | S Casal | 6 | 4 | 3 | | | | | | | |
| 2/WC | J Svensson | 6 | 3 | | | | | | | | | | | | | |