Born in Broni, in the Province of Pavia, Lombardy region, Colombi started his career at Emilian club Piacenza.
Inter Milan
In June 2010 Colombi and Andrea Lussardi were signed by Lombard club Inter Milan, with Andrea Mei and Luca Tremolada moved to opposite direction, all 4 in co-ownership deals.[2] In June 2011, both clubs bought back their youth products,[3] however Colombi remained in Milan in a temporary deal for another year. After Piacenza F.C. S.p.A. had bankrupted in summer 2012, Colombi re-joined Inter on a free transfer. Since 2011 Colombi had played for Inter first team in some friendly matches,[4] as well as unused bench in competitive matches.[5][6][7][8][9] Since Andrea Stramaccioni was sacked, Colombi did not receive call-up from Walter Mazzarri, for competitive match. Colombi had played once under Mazzarri, against Lugano in friendly.[10] On 30 January 2014, as part of Danilo D'Ambrosio's deal, Colombi moved to Torino in a temporary deal, with an option to purchase.[11][12] Torino did not excised the option to sign Colombi at the end of season.