The Juventus chief has insisted the Chile star will not leave the club in light of Louis van Gaal's interest while unveiling new coach Massimiliano Allegri to the press
New Old Trafford manager Louis van Gaal has reignited his interest in bringing the Chile star to Old Trafford after initially being quoted a €50 million-plus-Nani fee.
Antonio Conte resigned as Juventus coach on Tuesday over reported displeasure with the Serie A champions' transfer plans - including the potential sale of the 27-year-old.
But, following Massimiliano Allegri's appointment at San Siro on Wednesday, Marotta has underlined Vidal's importance to the squad.
"Vidal is not for sale, he is one of the most important players in the squad," Marotta told reporters at Allegri's unveiling. "Vidal is happy to be here."
Vidal admitted earlier this week that he would "love to join one of the biggest club's in the world" when questioned on United's interest.