# 1989 Torneo Internazionale Città di Firenze – Singles

Massimiliano Narducci was the defending champion, but lost in the first round to Eduardo Bengoechea.
Qualifier and sixth-seeded Horacio de la Peña won the title by defeating Goran Ivanišević 6–4, 6–3 in the final.

## Seeds

* Andrés Gómez (semifinals)
* Marcelo Filippini (first round)
* Luiz Mattar (quarterfinals)
* Eduardo Bengoechea (quarterfinals)
* Goran Ivanišević (final)
* Horacio de la Peña (champion)
* Lawson Duncan (semifinals)
* Fernando Luna (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 | Final | Final | Final | Final |
| 1/WC | Andrés Gómez | 1 | 1 | | | | |
| 6/Q | Horacio de la Peña | 6 | 6 | | | | |
| 6/Q | Horacio de la Peña | 6 | 6 | 6/Q | Horacio de la Peña | 6 | 6 |
| | | | | 5 | Goran Ivanišević | 4 | 3 |
| 5 | Goran Ivanišević | 6 | 6 | 5 | Goran Ivanišević | 4 | 3 |
| 7 | Lawson Duncan | 3 | 4 | | | | |

### 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 | A Gómez | 6 | 7 | | | | | | | | | | | | | | | |
| | T Meinecke | 2 | 5 | | 1/WC | A Gómez | 7 | 7 | | | | | | | | | | |
| | F Cancellotti | 6 | 6 | | | F Cancellotti | 5 | 6 | | | | | | | | | | |
| Q | C Caratti | 4 | 4 | | | | | | | 1/WC | A Gómez | 6 | 5 | 6 | | | | |
| WC | JL Clerc | 2 | 6 | 3 | | | | | | | O Camporese | 3 | 7 | 1 | | | | |
| | O Camporese | 6 | 3 | 6 | | O Camporese | 6 | 6 | | | | | | | | | | |
| | R Viver | 0 | 4 | | 8 | F Luna | 4 | 3 | | | | | | | | | | |
| 8 | F Luna | 6 | 6 | | | | | | | | | | | | 1/WC | A Gómez | 1 | 1 |
| 4 | E Bengoechea | 4 | 6 | 6 | | | | | | | | | | | 6/Q | H de la Peña | 6 | 6 |
| WC | M Narducci | 6 | 3 | 4 | 4 | E Bengoechea | 6 | 3 | 6 | | | | | | | | | |
| Q | F Clavet | 6 | 6 | | Q | F Clavet | 2 | 6 | 3 | | | | | | | | | |
| | M Cierro | 3 | 2 | | | | | | | 4 | E Bengoechea | 3 | 1 | | | | | |
| | C Miniussi | 6 | 7 | 2 | | | | | | 6/Q | H de la Peña | 6 | 6 | | | | | |
| | R Azar | 7 | 5 | 6 | | R Azar | 1 | 6 | | | | | | | | | | |
| | G Prpić | 3 | 2 | | 6/Q | H de la Peña | 6 | 7 | | | | | | | | | | |
| 6/Q | H de la Peña | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | G Ivanišević | 6 | 6 | | | | | | | | | | | | | | | |
| | P Rebolledo | 3 | 3 | | 5 | G Ivanišević | 6 | 3 | 6 | | | | | | | | | |
| | C Pistolesi | 2 | 4 | | Q | J Arias | 2 | 6 | 2 | | | | | | | | | |
| Q | J Arias | 6 | 6 | | | | | | | 5 | G Ivanišević | 7 | 6 | | | | | |
| | V Paloheimo | 6 | 6 | | | | | | | 3 | L Mattar | 6 | 1 | | | | | |
| | M Rackl | 3 | 0 | | | V Paloheimo | 7 | 4 | 3 | | | | | | | | | |
| | N Pereira | 4 | 6 | 5 | 3 | L Mattar | 5 | 6 | 6 | | | | | | | | | |
| 3 | L Mattar | 6 | 3 | 7 | | | | | | | | | | | 5 | G Ivanišević | 6 | 6 |
| 7 | L Duncan | 7 | 6 | | | | | | | | | | | | 7 | L Duncan | 3 | 4 |
| | C Panatta | 5 | 4 | | 7 | L Duncan | 6 | 6 | | | | | | | | | | |
| | G Giussani | 4 | 1 | | | N Kroon | 4 | 2 | | | | | | | | | | |
| | N Kroon | 6 | 6 | | | | | | | 7 | L Duncan | 4 | 7 | 6 | | | | |
| | N Marques | 6 | 6 | | | | | | | | T Tulasne | 6 | 5 | 1 | | | | |
| | J Stoltenberg | 4 | 4 | | | N Marques | 3 | 2 | | | | | | | | | | |
| | T Tulasne | 4 | 6 | 6 | | T Tulasne | 6 | 6 | | | | | | | | | | |
| 2 | M Filippini | 6 | 2 | 0 | | | | | | | | | | | | | | |