The veteran defender arrives from Napoli.
"This is the seventh pre-season retreat that I have participated in with Mazzarri in charge," he told Sport Italia. "We're working hard.
"I have come from a city where the passion of the fans is hot, but the stands here are full with supporters and I've rarely seen that.
"The expectation is to improve on last season. Now we must give our all and start the campaign with the intention of winning every game that we take part in."