 Bolzoni started out at San Colombano al Lambro before joining Inter's academy.Bolzoni has played for every academy team from the "Esordienti (under-13)" to the "Primavera (under-20)".During the season 2006–2007, Bolzoni was part of the winning side, when the reserve won the Campionato Nazionale Primavera (under-20 Italian Championship).