 Antonio served for nearly a decade (1787-1795/6) as the leading tenor in Domenico Guardasoni's opera troupe.In 1787, Antonio created the role of Don Ottavio in "Don Giovanni" in a performance personally conducted by the opera's composer, Wolfgang Amadeus Mozart.Four years later, Antonio created the role of Tito in another opera composed and conducted by Mozart, "La clemenza di Tito".