[1] She appeared in a series of concerts around Milan, and then moved to Rome, where she remained for the rest of her life.
Udovich made her opera debut in Agnese di Hohenstaufen by Spontini in 1954 at the Maggio Musicale Fiorentino with Franco Corelli and Giangiacomo Guelfi, conducted by Vittorio Gui.
She made other appearances with the Santa Cecilia Orchestra in Bartók's A Kekszakallu Herceg Vara, in Verdi's Requiem, and Rossini's Petite messe solennelle; with the RAI Orchestra in Benjamin Britten's Peter Grimes and War Requiem, and Schönberg's Gurre-Lieder.
Outside Italy, Udovich performed in Buenos Aires, Mexico City, Barcelona, Split, Zagreb, Ankara, Tel Aviv, Oslo, Dublin, Paris and London.
Her American appearances included San Francisco, Los Angeles, Pittsburgh, New Orleans, and Houston.