The former Manchester City midfielder is eager to play in the Champions League.
"At the moment there is nothing official for David and his contract expires in June 2014," Alejandro Santisteban told calciomercato.it.
"However, he wants to try another adventure in Europe.
"He's had a great season and I think he can play at the highest level for another year or two. He wants to leave and we'll go on the market."