The Catalans giants are looking to fill the void left by Dani Alves ever since he moved to the Italian champions.
Arsene Wenger has cited Valencia's reluctance to sell as a reason behind the delay in signing Mustafi
Barcelona's clash with Valencia wasn't short of drama, with the visitors emerging victorious after a late penalty.
Barcelona fought tooth and nail to return from the Mestalla Stadium with all the three points, in a game full of goals and late drama.
The Mestalla staged one of the most exciting La Liga matches in recent memory. The 5-goal thriller included goals from Messi, Suarez and Munir, an injury to Iniesta, and bottles being thrown at Neymar by the home fans.
The complete team news from Barcelona's trip to the Mestalla Stadium on Saturday.
Barcelona have not enjoyed the best of starts to the season and will be hoping to turn their fortunes around when they visit the Mestalla Stadium to take on Valencia, who are also in a bit of a rut themselves.
Out of favour Arsenal star Alex Oxlade-Chamberlain is reportedly wanted by La Liga duo - Valencia and Sevilla
A trio of Spanish clubs including Atletico Madrid are aiming to rival Italian giants Juventus for the Arsenal star, who will be out of contract at the end of the season.
Premier League giants Manchester United have opened talks with the 18-year-old Valencia midfield starlet, according to the teenager's agent.