Critics about the manager's complaints to the referee
The Sports daily Tuttosport was quite hard towards Pep Guardiola after the game between Juventus and Bayern Munich that ended up in a 2-2 draw. The Italian medium ran as their headline "he was the referee", referring to the complaints the Catalan manager had for the referee during the game and that, according to them, influenced the referee's decisions.
On the same front page, there is an editorial from Camillo Forte which title is "Inacceptable attitude" in which he's very ruthless: "Unacceptable and unworthy, an insult to football and the spirit of sport. While Massimiliano Allegri was giving instructions to his players not far from there, Pep Guardiola was giving instructions to the referees, espectially to Gary Beswick, the fourth official..."
On the other hand, the reference in sports media in Italia, La Gazetta dello Sport, doesn't mention the referee at all. There was no complaint from Juventus part either about that topic.