The Bulgarian tenor Roumen Doikov is a permanent member of the Sofia National Opera. His best known roles are the Duke in Rigoletto and Calaf in Turandot. He has sung in Central Europe, Japan, and at Siena, Italy. He has toured the United States with Teatro Lirico d'Europa in performances of Turandot.
Reviewing Mr. Doikov's performance of Calaf with Teatro Lirico d'Europa in Boston, Massachusetts, on March 20, 2000, T. J. Medrek wrote in the Boston Herald of March 22: "Bulgarian tenor Roumen Doikov gave the evening's finest performance as Calaf . . .. His big, sturdy voice grew in warmth throughout the opera. And if his acting was rudimentary, he didn't disappoint those who were in the audience mainly waiting for his hit tune, the aria 'Nessun dorma.'"
Review of Madama Butterfly in Los Angeles, February 2002