威尼斯省
Born in Dolo, the Province of Venice, Veneto, Magrassi started his career at A.C. Marco Polo, located in Mestre, the mainland part of the municipality of Venice. He then played for Venice () and Brescia Calcio (ca. 2009–12). Magrassi made his Serie B debut for Brescia on 13 November 2011 against Ascoli. He substituted Denis Maccan in the second half.