Yengo was a
FIFA referee who officiated international football matches between 1990 and 1998. He was one of the
CAF representatives at the
1991 FIFA Women's World Cup in
China. He refereed the group stage match between
Denmark and
New Zealand (3–0) and the quarter-final between the
United States and
Taiwan (7–0). Two months later, Yengo officiated a match at the
1993 FIFA World Youth Championship between
Norway and
Saudi Arabia (0-0) and later, the goalless first leg of the
1994 African Cup of Champions Clubs final between
Zamalek SC (Egypt) and
Espérance Sportive de Tunis (Tunisia). Yengo's career as a referee also included four appearances at the
Africa Cup of Nations. After overseeing one match each in
1992 and
1994, he was selected for group stage matches in the
1996 edition, and the third-place match between
Ghana and
Zambia. He also officiated two more matches at the
1998 African Cup of Nations, for which he received heavy criticism over his handling of a match between
Burkina Faso and
Guinea. == Selected record ==