 Brazil: Sao Paulo - Doubles - Main |
|---|
| 1/8-finals | Pierce M./Spadea-Nachmann L. | Reinstadler B./Tiezzi A. | 2:1 (7:6, 3:6, 6:3) | details | 26.11.1990 |
 Austria: Kitzbuhel - Doubles - Main |
|---|
| Quarter-finals | Budarova I./Meier S. | Sprung H./Tiezzi A. | 2:0 (6:2, 6:3) | details | 12.09.1990 |
| 1/8-finals | Avila N./Priller U. | Sprung H./Tiezzi A. | 0:2 (4:6, 2:6) | details | 10.09.1990 |
 Sweden: Bastad - Doubles - Main |
|---|
| 1/8-finals | Thoren P./Tiezzi A. | Bakkum C./Krijger-Jagerman N. | 0:2 (2:6, 1:6) | details | 09.07.1990 |
 Italy: Rome - Doubles - Main |
|---|
| 1/16-finals | Maleeva M./Savchenko-Neiland L. | Tiezzi A./Villagran-Reami A. | 2:0 (6:3, 6:2) | details | 07.05.1990 |
| Italy: Taranto - Doubles - Main |
|---|
| 1/8-finals | Garrone L./Golarsa L. | Chabalgoity C./Tiezzi A. | 2:0 (6:3, 7:6) | details | 01.05.1990 |
 Spain: Barcelona 2 - Doubles - Main |
|---|
| 1/8-finals | Scheuer-Larsen T./Thompson J. | Labat F./Tiezzi A. | 2:0 (7:5, 6:2) | details | 23.04.1990 |
| Brazil: Guaruja - Doubles - Main |
|---|
| Semi-finals | Paz M./Tarabini P. | Tiezzi A./Reami A. | 2:0 (6:3, 6:2) | details | 16.12.1989 |
| Quarter-finals | Tiezzi A./Reami A. | Schwartz A./ter Riet H. | 2:0 (6:4, 7:6) | details | 13.12.1989 |
| 1/8-finals | Tiezzi A./Reami A. | Albinus S./Van Lottum N. | WO. | details | 11.12.1989 |
