Italy Under-20 international Romagna has agreed a five-year deal with Cagliari, which travels to Juventus in the opening game of the new Serie A season.

Defender Del Fabro spent last season on loan at Pisa - which was relegated from Serie B despite having the second-best defensive record in the division - and the 22 year-old will switch to Turin for $A7 million.

"With his personality, vision of play, anticipation and heading ability, he is certainly one of the most promising central defenders in Italian football," a Cagliari statement read. "Welcome to the Rossoblu, Filippo!"