sentences:  His first appearance at the Teatro alla Scala was in 1967, as Enrico in "Lucia di Lammermoor", opposite Renata Scotto, subsequently appearing there in "Il trovatore" (1978), "I due Foscari" (1980), and "Falstaff" (as Ford, conducted by Lorin Maazel, and directed by Giorgio Strehler, 1981).Sardinero also sang at London's Covent Garden (Marcello in "La bohème", 1976) and was often heard in zarzuela.In 1968, he appeared at the New York City Opera, in "Il barbiere di Siviglia" and "Pagliacci".