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The event drew 30,000 fans who celebrated the return of the 36-year-old midfielder, who joined the club last month.
Vidal made 96 appearances for Barca in two seasons, scoring 11 goals and providing 10 assists in all competitions.
Chilean midfielder Arturo Vidal struck the only goal of the game in the 15th minute, firing into the net off the post after being played in by Messi.
The Chilean’s lawyers have filed a complaint to Spain’s player’s union (AFE) citing an unpaid bonus of 2.4 million euros (2.05 million pounds).
The 31-year-old, who has played 100 games for Chile and scored 24 goals, will sign a three-year deal after having a medical in the next few days.