Although their father Valentino had played for Torino F.C., Sandro Mazzola and his brother Ferruccio signed for Internazionale. Unlike his younger brother, Sandro Mazzola spent his entire career with Inter, scoring 116 Serie A goals for the club in 417 league appearances. He made his Serie A debut under manager Helenio Herrera during the 1960–61 season, along with many other youngsters, against rivals Juventus on 10 June 1961, scoring his team's only goal from a penalty in a 9–1 loss; this was his only appearance of the season. Herrera had joined Inter a year earlier, from Spanish side Barcelona, along with his midfield general Luis Suárez, who would serve as Inter's main playmaker during the 1960s.