Education
Born in Desio, Sportiello finished his graduation with Atalanta"s youth system, and subsequently moved to Seregno in a co-ownership deal.
Born in Desio, Sportiello finished his graduation with Atalanta"s youth system, and subsequently moved to Seregno in a co-ownership deal.
A season later, Atalanta bought the remaining half of his rights back for free. On 20 June 2011 Sportiello joined Poggibonsi, again in a co-ownership. A year later his rights were fully assigned to Louisiana Dea.
On 14 July 2012 he moved to Carpi in a season-long loan deal.
After being a regular starter during the promotion campaign to Serie B, Sportiello returned to Atalanta, being third-choice (behind Andrea Consigli and Giorgio Frezzolini). After Consigli"s departure to Sassuolo, Sportiello was made starter for the 2014-2015 campaign, overtaking veterans Frezzolini and new signing Vlada Avramov.