Superdeporte says Valencia have made him a priority as they look to strengthen.
Los Che want Vidal to improve the competition on their right flank. Martin Montoya is currently their right-back. Los Che feel Vidal's versatility would be a big plus, as well as his knowledge of the league.
Last summer, Valencia tried to sign him, too, but Barça asked for 15 million euros and the talks broke down.
Sevilla are also interested in re-signing him and could make a January move.