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