The Inter defender has admitted he has much respect for the Chilean's abilities on the pitch, but hopes his side can replicate last season's success at Juventus Stadium
The Chilean star, who is on the verge of signing a contract extension with the Bianconeri, has been a crucial part of their last two title-winning seasons.
And Juan is well aware of the threat Vidal poses in front of goal.
"I'm very afraid of Vidal," the 22-year-old told La Gazzetta dello Sport.
"He has an excellent shooting technique and is a well-rounded footballer.
"But they are also very good defensively, with [Giorgio] Chiellini, [Andrea] Barzagli and [Leonardo] Bonucci at the back."
The Nerazzurri won 3-1 against Antonio Conte's men at the Juventus Stadium last season, and Juan hopes this success can be emulated this weekend.
"Personally, I remember last season's victory well because I played great. I would like to replicate this on Saturday at the San Siro," he added.
"At home, we must always play well and earn three important points.
"We have to play together, be compact and focused because it is a game that requires our concentration levels to be at 100 per cent.
"And some of our players like [Rodrigo] Palacio can make a difference, I'm sure he'll play great."