[1] Davidyan was born in the village of Chartar within the Martuni Region of Nagorno-Karabakh to an Armenian family.

After the 1974 World Championships, Davidyan switched back to featherweight and competed in this class until the end of his career in 1981.

After moving back to featherweight, Davidyan won the 1975 World Wrestling Championships as well as the 1975 and 1976 Soviet titles.

Despite being the European Champion, he wasn't given any reason for not being selected to compete at the 1980 Summer Olympics in Moscow, and retired from wrestling in 1981.

He was head coach of the Ukrainian national Greco-Roman wrestling team in the 1990s and also held that post again from 2006 to 2009.