He made his debut at the Teatro Nicolini in Florence in 1902 as Arturo to Luisa Tetrazzini's Elvira in Vincenzo Bellini's I puritani.
[3][1] In 1904 Andreini was committed to the Teatro Massimo in Palermo, where he notably portrayed Turiddu opposite Eugenia Burzio's Santuzza and Pasquale Amato's Alfio in a lauded production of Pietro Mascagni's Cavalleria rusticana.
Other roles he sang at Palermo that year included Edgardo in Donizetti's Lucia di Lammermoor and Almaviva in Rossini's The Barber of Seville.
[1] In 1907 Andreini returned to Italy to join the roster of artists at the Politaema Parma where he made his debut as Canio in Ruggero Leoncavallo's Pagliacci.
In 1916, he was committed to the Havana Opera in Cuba, where he performed Alfredo in La traviata to Amelita Galli-Curci's Violetta for his debut with the company.