"I have seen people targeting Patrick Vieira when he played. He was a monster and he could take it. I saw tackles on Patrick which were unbelievable.
"That doesn't exist anymore because the media are more alert and quicker to punish it."
The Arsenal boss added: "The only thing you can say is the consequence of the speed of the games is that the referees today in a situation cannot always see what is happening.
"Maybe he should have a kind of super tribunal that can make decisions above the referee after the game. It would take some pressure off."