"I understand he is the first Italian international to play for Liverpool - a great opportunity for him and he is really happy," said Frederico Pastorello.
"He had his medical on Wednesday and we are just awaiting the formalities of that but we would think everything will be signed very shortly.
"An agreement between the clubs was hard, but we all found it and everything is now ready.
"There were many teams interested in him. He was the best left-back in Italy last year, arguably along with [Juan] Vargas at Catania.
"So it was natural that there will be interest in the best left-back in Serie A, but to have the chance to work with a coach like Rafa Benitez was something he could not turn down.
"That was an important aspect of his decision and he cannot wait to get started."