[2] Giordani made his professional operatic debut in 1986 as the Duke in Rigoletto at the Festival dei Due Mondi in Spoleto.

[4] Giordani made his Metropolitan Opera debut in 1993 as Nemorino in a Parks performance of L'elisir d'amore opposite Maria Spacagna as Adina.

[6] His first performance on the actual stage at the Metropolitan Opera House was on 11 December 1995 as Rodolfo to Hei-Kyung Hong's Mimì with Carlo Rizzi conducting.

[7] In 1995 he sang Alfredo in La traviata at Covent Garden under Sir Georg Solti, whose guidance he credited as a great help in the rebuilding of his career.

[6] A reviewer for The New York Times wrote that he sang Pinkerton "with full-bodied Italianate passion; warm, rich tone; and clarion top notes".

[2] In August 2008, Giordani appeared in concert with Salvatore Licitra and Ramón Vargas in Beijing's Great Hall of the People during the first week of the 2008 Olympic Games.

[2] 2008 also saw his appointment as artistic director for Musical Events at Città della Notte, a new arts center near Augusta.