Manchester United chief Sir Alex Ferguson last week hit back at Liverpool boss Rafael Benitez, whom he accused of "arrogance" and showing "contempt" in the wake of the Spaniard's attitude in dismissing Blackburn once his side had scored their second goal at Anfield.

Wenger takes his side, who lost their FA Cup semi-final against Chelsea at Wembley on Saturday, to Liverpool on Tuesday night but the French coach is no stranger to some verbal sparring.

However, Wenger said: "You want respect in the game, and we managers are responsible for it. I do not want to interfere in that more because I do not know what happened (between Ferguson and Benitez).

"I believe it (mind games) was always something which was overrated a bit. But it is part of our environment and part of the media.

"You never know how much impact it has because it is impossible to measure. It is a little bit like advertising - it is needed but what impact it has on sales you never know. With mind games it's the same."