The tenor, Nikolai Zdravkov, was born in the Lom region of Bulgaria. Until 1939 he was a factory worker. He began his musical activity in 1948 as a member of the chorus "Kaval" and as a member of an Ensemble for Folk Singing and Dancing. During this time he studied privately with Ilija Jossifov.
In 1953 he joined the Ruse Opera as a soloist and made his debut on May 2nd of that year as Cavaradossi. In 1955-56 he continued his studies at the Bolshoi Theater in Moscow at the same time appearing with opera companies throughout the USSR. After 1954, in addition to singing throughout Bulgaria, he appeared as a guest on many European opera stages. He traveled to China on a concert tour in 1959.
Nikolai Zdravkov received many international awards including Bucharest in 1953, Paris in 1954 and Belgium in 1957. Major roles in his career included the Duke in Rigoletto, Alfredo, Nadir, and Pinkerton.
Puccini: Tosca E lucevan le stelle
Tchiakovsky: Eugene Onegin "Lensky's Aria"
Verdi: Rigoletto La donna é mobile