Aníbal Troilo
In 1947, Rivero was hired by Aníbal Troilo, who was having a stellar run of recordings with new hit songs, many of them in collaboration with lyricist Homero Manzi. During his three years with Troilo, Rivero shared the limelight with Floreal Ruiz and Aldo Calderón, and recorded 22 songs, including the mega-hit "Sur", where Troilo's melody frames Manzi's elegy for a young love and also for the old .