During his professional career, which spanned nearly 20 years, Zdravkov represented Lokomotiv Sofia (1973–80), CSKA Sofia (1980–86), Portugal's G.D. Chaves (1986–89), Sporting de Braga (1989–90), Paços de Ferreira (1990–91) and F.C. Felgueiras (1991–92) - after he had left the Iron Curtain at the age of 30 - Yantra Gabrovo (1992–93) and Litex Lovech (1993–94).