Japan: Tokyo - Singles - Main |
| 1/32-finals | Yamamoto Y. | Gross O. | 0:2 (4:6, 4:6) | details | 12.04.1999 |
Australia: Australian Open - Singles - Qualification |
| Quarter-finals | Yamamoto Y. | Bozic I. | 0:2 (5:7, 0:6) | details | 19.01.1998 |
Japan: Tokyo - Singles - Main |
| 1/32-finals | Yamamoto Y. | Arriens C. | 0:2 (2:6, 5:7) | details | 14.04.1997 |
USA: US Open - Singles - Qualification |
| Quarter-finals | Hernandez A. (. | Yamamoto Y. | 2:0 (6:1, 6:1) | details | 20.08.1996 |
Japan: Tokyo - Singles - Main |
| 1/32-finals | Yamamoto Y. | Carlsen K. | 1:2 (7:5, 4:6, 2:6) | details | 15.04.1996 |
Australia: Australian Open - Singles - Qualification |
| Final | Yamamoto Y. | Nainkin D. | 0:2 (2:6, 66:7) | details | 18.01.1996 |
| Semi-finals | Yamamoto Y. | Goodarz M. | 2:1 (4:6, 7:63, 6:1) | details | 17.01.1996 |
| Quarter-finals | Knowles M. | Yamamoto Y. | 0:2 (64:7, 4:6) | details | 15.01.1996 |
USA: US Open - Singles - Qualification |
| Quarter-finals | Yamamoto Y. | Golmard J. | 0:2 (2:6, 3:6) | details | 24.08.1994 |
Japan: Tokyo - Singles - Main |
| 1/32-finals | Olhovskiy A. | Yamamoto Y. | 2:0 (6:4, 6:4) | details | 04.04.1994 |
Japan: Osaka - Singles - Main |
| 1/16-finals | Tarango J. | Yamamoto Y. | 2:0 (6:1, 6:4) | details | 28.03.1994 |
Australia: Australian Open - Singles - Qualification |
| Quarter-finals | Yamamoto Y. | Roux L. | 0:2 (1:6, 65:7) | details | 12.01.1994 |
Japan: Tokyo 2 - Singles - Main |
| 1/32-finals | Yamamoto Y. | Morgan J. | 0:2 (4:6, 3:6) | details | 11.10.1993 |
Malaysia: Kuala Lumpur 2 - Singles - Main |
| 1/16-finals | Yamamoto Y. | Chang M. | 0:2 (5:7, 2:6) | details | 27.09.1993 |
USA: US Open - Singles - Qualification |
| Quarter-finals | Yamamoto Y. | Tucker T. | 1:2 (7:6, 5:7, 3:6) | details | 25.08.1993 |
Japan: Tokyo - Singles - Main |
| 1/32-finals | Yamamoto Y. | Kaneko H. | 1:2 (7:67, 64:7, 3:6) | details | 05.04.1993 |
Japan: Osaka - Singles - Main |
| 1/16-finals | Yamamoto Y. | Adams C. | 1:2 (6:4, 4:6, 3:6) | details | 29.03.1993 |
Japan: Tokyo 2 - Singles - Main |
| 1/32-finals | Yamamoto Y. | Mezzadri C. | 1:2 (3:6, 6:3, 3:6) | details | 12.10.1992 |
Japan: Tokyo 2 - Singles - Main |
| 1/32-finals | Weiss R. | Yamamoto Y. | 2:0 (6:2, 6:3) | details | 07.10.1991 |