Select tournament type
| 1/16-finals | Antonitsch A. | Colombo S. | 2:1 (4:6, 6:3, 7:6) | details | 31.07.1990 | ||
| 1/32-finals | Raoux G. | Colombo S. | 1:2 (7:6, 6:7, 6:7) | details | 30.07.1990 | ||
| Quarter-finals | Colombo S. | Wostenholme M. | 0:2 (2:6, 2:6) | details | 06.04.1990 | ||
| 1/8-finals | Motta C. | Colombo S. | 0:2 (6:7, 3:6) | details | 04.04.1990 | ||
| 1/16-finals | Ingaramo M. | Colombo S. | 0:2 (4:6, 5:7) | details | 02.04.1990 | ||
| Quarter-finals | Cierro M./Colombo S. | Gorriz M. A./Mora A. | 0:2 (6:7, 4:6) | details | 19.06.1991 | ||
| 1/8-finals | Gaudenzi A./Muster T. | Cierro M./Colombo S. | 1:2 (6:4, 4:6, 4:6) | details | 17.06.1991 | ||
| 1/16-finals | Cierro M./Colombo S. | Bahrami M./Winogradsky E. | 0:2 (3:6, 4:6) | details | 13.05.1991 | ||
| Quarter-finals | Borwick N./Lewis D. | Colombo S./Olhovskiy A. | 2:1 (7:6, 3:6, 6:2) | details | 13.09.1990 | ||
| 1/8-finals | Colombo S./Olhovskiy A. | De La Pena H./MacPherson D. | 2:1 (7:6, 6:7, 6:4) | details | 10.09.1990 | ||