On 30 August 2005, Brivio left Atalanta, who had just been relegated to Serie B, to join Fiorentina, who purchased half of the player's license, for €1 million.

[1] On 7 August 2007, he was sold to Vicenza in another joint-ownership arrangement, as part of a deal that brought Simone Padoin back to Atalanta.

[2] The overall transactions made Vicenza paid €100,000 cash in net, and the full registration rights of Padoin to Atalanta in order to acquire Brivio and Zampagna.

Co-currently, Vicenza excised the option to sign Schiavi outright for the same price, made the deal a direct cashless swap.

[11] He was amongst the losing semi-finalists as Italy were defeated by the Netherlands in the 2005 UEFA European Under-17 Football Championship, and took part in the Italian victory over Croatia in the Third Place Playoff.