Tim Sherwood says the Chilean was wrong to give Arsene Wenger the "cold shoulder" upon being subbed.
The in-form Chilean magician, who had netted five Premier League goals in as many games coming into the clash with the Canaries, endured a frustrating evening yesterday and was substituted for Francis Coquelin on 84 minutes.
Sanchez appeared to snub a handshake from the Gunners boss before storming straight down the tunnel with no visible injury, prompting suggestions on Twitter that he is growing fed up with life in North London.
And Sherwood certainly feels as if the incident was symptomatic of a wider problem at Arsenal in terms of harmony, but still refused to condone Sanchez giving his 66-year-old boss the "cold shoulder".
"Straight away he takes the strapping off his wrist and throws it to the floor, which breeds a bad vibe around the place," he told Sky Sports, quoted by Goal.com. "To go straight down the tunnel…
"I'm happy to see him shake hands with his teammate [Francis Coquelin] but then he just gives Arsene the cold shoulder and walks straight down the tunnel which is very disappointing for any manager to see."
He's obviously disgruntled. It just shows the disharmony in the squad there at Arsenal. I might have a quiet word with him [if he was Wenger] and tell him I wasn't happy with that. It is disrespectful."
Second-half sub Danny Welbeck scored the only goal of the game in a victory which saw Wenger's side move third in the Premier League table, two points behind Spurs, who have a game in hand.