Arsenal boss Arsene Wenger has hit back at Paul Merson after criticism from the Gunners hero.
Merson blasted Wenger over Arsenal's collapse against Anderlecht last week.
Wenger said: "You have to defend well and attack well. Why should you stop playing one of the aspects of the game?
"These debates that I hear are a joke, a farce. People who have managed zero games, they teach everybody how you should behave. It's a farce. Honestly, I cannot even be upset about it.
Merson was an early casualty of Wenger's reign when he was sold to Middlesbrough in 1997.
"Honestly, it does not matter to me. You say what you want. You are free. I managed him. I tried. I'm not interested in Paul Merson."
