| Men's doubles | |
|---|---|
| 1990 Italian Open | |
| Champions |  Sergio Casal Emilio Sánchez |
| Runners-up |  Jim Courier Martin Davis |
| Final score | 7–6, 7–5 |
Jim Courier and Pete Sampras were the defending champions, but Sampras did not participate this year. Courier partnered Martin Davis, losing in the final
Sergio Casal and Emilio Sánchez won the title, defeating Courier and Davis 7–6, 7–5 in the final.
Rick Leach / Jim Pugh (first round) Jim Grabb / Patrick McEnroe (first round)
Jorge Lozano / Todd Witsken (quarterfinals)
Guy Forget / 
Jakob Hlasek (first round) Sergio Casal / Emilio Sánchez (champions)
Petr Korda / Tomáš Šmíd (first round)
Michael Mortensen / 
Tom Nijssen (first round) Patrick Galbraith / 
David Macpherson (first round)| Semifinals | Final | ||||||||||||
 Simone Colombo  Nicklas Utgren | 2 | 3 | |||||||||||
| 5 | Sergio Casal Emilio Sánchez | 6 | 6 | ||||||||||
| 5 | Sergio Casal Emilio Sánchez | 7 | 7 | ||||||||||
| Jim Courier Martin Davis | 6 | 5 | |||||||||||
| Broderick Dyke Laurie Warder | 3 | 4 | |||||||||||
| Jim Courier Martin Davis | 6 | 6 | |||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | R Leach J Pugh | 7 | 5 | 3 | |||||||||||||||||||||||
 G Luza  L Mattar | 6 | 7 | 6 | G Luza L Mattar | 6 | 3 | |||||||||||||||||||||
| D Marcelino M Menezes | 2 | 6 | M Jaite C Motta | 7 | 6 | ||||||||||||||||||||||
| M Jaite C Motta | 6 | 7 | M Jaite C Motta | 6 | 3 | ||||||||||||||||||||||
| B Gilbert D Nargiso | 4 | 4 | S Colombo N Utgren | 7 | 6 | ||||||||||||||||||||||
| S Colombo N Utgren | 6 | 6 | S Colombo N Utgren | w/o | |||||||||||||||||||||||
| O Camporese P Canè | 6 | 1 | 6 | O Camporese P Canè | |||||||||||||||||||||||
| 8 | P Galbraith D Macpherson | 4 | 6 | 3 | S Colombo N Utgren | 2 | 3 | ||||||||||||||||||||
| 3 | J Lozano T Witsken | 6 | 4 | 6 | 5 | S Casal E Sánchez | 6 | 6 | |||||||||||||||||||
 C di Laura  M Filippini | 3 | 6 | 3 | 3 | J Lozano T Witsken | 6 | 3 | 6 | |||||||||||||||||||
| LL | N Bruno S Pescosolido | 6 | 2 | 3 | A Mancini G Pérez Roldán | 4 | 6 | 2 | |||||||||||||||||||
| A Mancini G Pérez Roldán | 1 | 6 | 6 | 3 | J Lozano T Witsken | 3 | 4 | ||||||||||||||||||||
| T Pawsat G Van Emburgh | 6 | 3 | 1 | 5 | S Casal E Sánchez | 6 | 6 | ||||||||||||||||||||
 S Kruger R Reneberg | 2 | 6 | 6 | S Kruger R Reneberg | 3 | 3 | |||||||||||||||||||||
| Q | F Beraldo A Gaudenzi | 1 | 6 | 3 | 5 | S Casal E Sánchez | 6 | 6 | |||||||||||||||||||
| 5 | S Casal E Sánchez | 6 | 2 | 6 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | P Korda T Šmíd | 4 | 5 | ||||||||||||||||||||||||
| B Dyke L Warder | 6 | 7 | B Dyke L Warder | 6 | 3 | 6 | |||||||||||||||||||||
 M Bahrami J-P Fleurian | 4 | 6 | 3 | T Carbonell C Costa | 2 | 6 | 2 | ||||||||||||||||||||
| T Carbonell C Costa | 6 | 3 | 6 | B Dyke L Warder | 6 | 6 | |||||||||||||||||||||
| T Anzari D Rikl | 6 | 1 | 3 | J Frana C Miniussi | 1 | 4 | |||||||||||||||||||||
| J Frana C Miniussi | 4 | 6 | 6 | M Jaite C Miniussi | 6 | 4 | 6 | ||||||||||||||||||||
| P Haarhuis M Schapers | 7 | 3 | 6 | P Haarhuis M Schapers | 3 | 6 | 4 | ||||||||||||||||||||
| 4 | G Forget J Hlasek | 6 | 6 | 3 | B Dyke L Warder | 3 | 4 | ||||||||||||||||||||
| 7 | M Mortensen T Nijssen | 3 | 2 | J Courier M Davis | 6 | 6 | |||||||||||||||||||||
| K Nováček M Šrejber | 6 | 6 | K Nováček M Šrejber | 1 | 5 | ||||||||||||||||||||||
| J Čihák C Suk | 3 | 6 | 6 | J Čihák C Suk | 6 | 7 | |||||||||||||||||||||
| C Beckman L Jensen | 6 | 4 | 3 | J Čihák C Suk | 2 | 6 | |||||||||||||||||||||
| J Courier M Davis | 6 | 3 | 6 | J Courier M Davis | 6 | 7 | |||||||||||||||||||||
| Q | C Caratti F Mordegan | 4 | 6 | 1 | J Courier M Davis | 6 | 6 | ||||||||||||||||||||
| J Sánchez J Yzaga | 6 | 6 | J Sánchez J Yzaga | 1 | 1 | ||||||||||||||||||||||
| 2 | J Grabb P McEnroe | 4 | 3 | ||||||||||||||||||||||||
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