 Japan: Tokyo 4 - Doubles - Main |
|---|
| 1/8-finals | Donoshiro Mami/Tanaka Y. | Okagawa E./Koizumi Y. | 2:0 (6:4, 6:2) | dettagli | 21.09.1992 |
| Japan: Osaka 2 - Doubles - Main |
|---|
| 1/8-finals | Koizumi Y./Mizokuchi M. | Date K./Rehe S. | 0:2 (2:6, 2:6) | dettagli | 03.02.1992 |
| Japan: Tokyo 3 - Doubles - Main |
|---|
| 1/8-finals | Novelo L./Somerville B. | Koizumi Y./Minter A. | 2:1 (4:6, 6:4, 7:6) | dettagli | 08.04.1991 |
| Japan: Tokyo 4 - Doubles - Main |
|---|
| Quarter-finals | Frazier A./Koizumi Y. | Fernandez M. J./White R. | 0:2 (1:6, 4:6) | dettagli | 27.09.1990 |
| 1/8-finals | Donoshiro Mami/Sugiyama A. | Frazier A./Koizumi Y. | 0:2 (1:6, 2:6) | dettagli | 25.09.1990 |
 Singapore: Singapore - Doubles - Main |
|---|
| 1/16-finals | Faull J./Stubbs R. | Kijimuta A./Koizumi Y. | 2:1 (6:2, 4:6, 6:3) | dettagli | 23.04.1990 |
 USA: Oklahoma City - Doubles - Main |
|---|
| 1/8-finals | Santrock J./Koizumi Y. | Camille B./Hiraki R. | 0:2 (3:6, 3:6) | dettagli | 19.02.1990 |
New Zealand: Wellington - Singles - Main
Australia: Australian Open - Singles - Qualification