Gigli made many important debuts in quick succession, and always in "Mefistofele": Teatro Massimo in Palermo (31 March 1915), Teatro di San Carlo in Naples (26 December 1915), Teatro Costanzi di Roma (26 December 1916), La Scala, Milan (19 November 1918), Teatro Colón, Buenos Aires (28 June 1919) and finally the Metropolitan Opera, New York City (26 November 1920). Two other great Italian tenors present on the roster of Met singers during the 1920s also happened to be Gigli's chief contemporary rivals for tenor supremacy in the Italian repertory—namely, Giovanni Martinelli and Giacomo Lauri-Volpi.