1989 Italian Open – Men's singles
# 1989 Italian Open – Men's singles

Alberto Mancini won in the final 6–3, 4–6, 2–6, 7–6, 6–1 against Andre Agassi.

Ivan Lendl was the defending champion but did not compete this year.

## Seeds

* Mats Wilander (third round)
* Andre Agassi (final)
* Kent Carlsson (first round)
* Miloslav Mečíř (first round)
* Jimmy Connors (third round)
* Emilio Sánchez (third round)
* Aaron Krickstein (second round)
* Guillermo Pérez Roldán (quarterfinals)
* Ronald Agénor (first round)
* Darren Cahill (third round)
* Alberto Mancini (champion)
* Andrés Gómez (first round)
* Jaime Yzaga (third round)
* Horst Skoff (first round)
* Marcelo Filippini (second round)
* Mark Woodforde (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 | Final | Final | Final |
| - | - | - | - | - | - | - | - | - | - | - |
| | Jordi Arrese | 2 | 4 | | | | | | | |
| 11 | Alberto Mancini | 6 | 6 | | | | | | | |
| 11 | Alberto Mancini | 6 | 6 | 11 | Alberto Mancini | 6 | 4 | 2 | 7 | 6 |
| | | | | 2 | Andre Agassi | 3 | 6 | 6 | 6 | 1 |
| | Sergi Bruguera | 3 | 4 | 2 | Andre Agassi | 3 | 6 | 6 | 6 | 1 |
| 2 | Andre Agassi | 6 | 6 | | | | | | | |

### Top half

**Section 1**

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | M Wilander | 6 | 6 | 6 | | | | | | | | | | | | | |
| | J Frana | 7 | 3 | 2 | 1 | M Wilander | 4 | 6 | 6 | | | | | | | | |
| | J Sánchez | 6 | 6 | | | J Sánchez | 6 | 4 | 3 | | | | | | | | |
| | J Nyström | 3 | 0 | | | | | | | 1 | M Wilander | 3 | 4 | | | | |
| | J Arias | 6 | 3 | 0 | | | | | | | J Berger | 6 | 6 | | | | |
| | J Berger | 4 | 6 | 6 | | J Berger | 7 | 6 | | | | | | | | | |
| | J Gunnarsson | 5 | 4 | | 15 | M Filippini | 5 | 3 | | | | | | | | | |
| 15 | M Filippini | 7 | 6 | | | | | | | | | | | | J Berger | 1 | 1 |
| 10 | D Cahill | 1 | 7 | 6 | | | | | | | | | | | J Arrese | 6 | 6 |
| Q | F Davín | 6 | 5 | 2 | 10 | D Cahill | 6 | 2 | 6 | | | | | | | | |
| | M Střelba | 1 | 7 | 6 | | M Střelba | 3 | 6 | 2 | | | | | | | | |
| | L Mattar | 6 | 6 | 0 | | | | | | 10 | D Cahill | 6 | 3 | 5 | | | |
| | J Arrese | 6 | 4 | 6 | | | | | | | J Arrese | 3 | 6 | 7 | | | |
| | M Šrejber | 2 | 6 | 1 | | J Arrese | 6 | 7 | | | | | | | | | |
| | A Võsand | 3 | 2 | | 7 | A Krickstein | 4 | 5 | | | | | | | | | |
| 7 | A Krickstein | 6 | 6 | | | | | | | | | | | | | | |

**Section 2**

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 4 | M Mečíř | 2 | 5 | | | | | | | | | | | | | | |
| WC | O Camporese | 6 | 7 | WC | O Camporese | 5 | 6 | 6 | | | | | | | | | |
| | G Ivanišević | 6 | 6 | | G Ivanišević | 7 | 4 | 2 | | | | | | | | | |
| | N Pereira | 4 | 3 | | | | | | WC | O Camporese | 6 | 6 | | | | | |
| Q | N Marques | 3 | 1 | | | | | | 13 | J Yzaga | 3 | 4 | | | | | |
| | T Nijssen | 6 | 6 | | T Nijssen | 2 | 2 | | | | | | | | | | |
| | M Vajda | 5 | 2 | 13 | J Yzaga | 6 | 6 | | | | | | | | | | |
| 13 | J Yzaga | 7 | 6 | | | | | | | | | | WC | O Camporese | 5 | 7 | 3 |
| 11 | A Mancini | 6 | 6 | | | | | | | | | | 11 | A Mancini | 7 | 6 | 6 |
| Q | F Clavet | 3 | 2 | 11 | A Mancini | 6 | 6 | | | | | | | | | | |
| | L Duncan | 7 | 6 | | L Duncan | 2 | 1 | | | | | | | | | | |
| | T Tulasne | 5 | 1 | | | | | | 11 | A Mancini | w/o | | | | | | |
| WC | M Narducci | 5 | 4 | | | | | | 6 | E Sánchez | | | | | | | |
| | M Jaite | 7 | 6 | | M Jaite | 2 | 5 | | | | | | | | | | |
| | E Bengoechea | 1 | 2 | 6 | E Sánchez | 6 | 7 | | | | | | | | | | |
| 6 | E Sánchez | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half

**Section 3**

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 5 | J Connors | 6 | 6 | | | | | | | | | | | | | | |
| Q | C Pioline | 4 | 2 | | 5 | J Connors | 6 | 6 | 6 | | | | | | | | |
| Q | C di Laura | 1 | 1 | | Q | M Cierro | 7 | 2 | 3 | | | | | | | | |
| Q | M Cierro | 6 | 6 | | | | | | | 5 | J Connors | 1 | 1 | | | | |
| | K Nováček | 6 | 6 | | | | | | | | S Bruguera | 6 | 6 | | | | |
| | S Casal | 1 | 2 | | | K Nováček | 6 | 4 | 3 | | | | | | | | |
| | S Bruguera | 2 | 6 | 6 | | S Bruguera | 2 | 6 | 6 | | | | | | | | |
| 12 | A Gómez | 6 | 2 | 2 | | | | | | | | | | | S Bruguera | 6 | 6 |
| 14 | H Skoff | 5 | 6 | 3 | | | | | | | | | | | M Koevermans | 2 | 4 |
| | D Nargiso | 7 | 4 | 6 | | D Nargiso | 6 | 6 | | | | | | | | | |
| | C Motta | 3 | 6 | 2 | | C Pistolesi | 2 | 1 | | | | | | | | | |
| | C Pistolesi | 6 | 2 | 6 | | | | | | | D Nargiso | 3 | 6 | 1 | | | |
| | J Stoltenberg | 4 | 5 | | | | | | | | M Koevermans | 6 | 3 | 6 | | | |
| WC | J L Clerc | 6 | 7 | | WC | J L Clerc | 3 | 1 | | | | | | | | | |
| | M Koevermans | 6 | 6 | | | M Koevermans | 6 | 6 | | | | | | | | | |
| 3 | K Carlsson | 3 | 4 | | | | | | | | | | | | | | |

**Section 4**

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 8 | G Pérez Roldán | 6 | 6 | | | | | | | | | | | | | | | |
| | T Champion | 1 | 0 | | 8 | G Pérez Roldán | 7 | 6 | | | | | | | | | | |
| | H de la Peña | 6 | 4 | | Q | J Potier | 6 | 4 | | | | | | | | | | |
| Q | J Potier | 7 | 6 | | | | | | | 8 | G Pérez Roldán | 6 | 6 | 6 | | | | |
| WC | C Panatta | 1 | 2 | | | | | | | | J Courier | 1 | 7 | 3 | | | | |
| | J Courier | 6 | 6 | | | J Courier | 6 | 6 | | | | | | | | | | |
| | B Orešar | 7 | 3 | 6 | | B Orešar | 4 | 1 | | | | | | | | | | |
| 9 | R Agénor | 6 | 6 | 2 | | | | | | | | | | | 8 | G Pérez Roldán | 3 | 1 |
| 16 | M Woodforde | 2 | 3 | | | | | | | | | | | | 2 | A Agassi | 6 | 6 |
| | F Luna | 6 | 6 | | | F Luna | 3 | 6 | 3 | | | | | | | | | |
| WC | S Pescosolido | 4 | 1 | | | L Lavalle | 6 | 3 | 6 | | | | | | | | | |
| | L Lavalle | 6 | 6 | | | | | | | | L Lavalle | 3 | 4 | | | | | |
| Q | D Pérez | 2 | 3 | | | | | | | 2 | A Agassi | 6 | 6 | | | | | |
| | P Sampras | 6 | 6 | | | P Sampras | 2 | 1 | | | | | | | | | | |
| | T Witsken | 1 | 4 | | 2 | A Agassi | 6 | 6 | | | | | | | | | | |
| 2 | A Agassi | 6 | 6 | | | | | | | | | | | | | | | |
