Manchester City announced the signing of Serbia defender Matija Nastasic from Fiorentina on Friday, with Stefan Savic heading in the opposite direction.

The 19-year-old Nastasic becomes the fourth player to arrive at City on deadline day, joining Maicon, Scott Sinclair and Richard Wright.

Nastasic played in 26 games for the Viola since his arrival at the club in 2011, while Savic, 21, departs City after just one season in which he made 11 appearances for Roberto Mancini's side.