Manchester United boss Sir Alex Ferguson has backed his Arsenal counterpart Arsene Wenger after the Frenchman experienced a tough summer.
Ahead of the clash between the two clubs at Old Trafford on Sunday, Ferguson feels the recent criticism directed at Wenger is unfair as he has been at the helm of the club during its best ever period.
"The work he has done in the 15 years he has been at the club is the best in Arsenal's history," said Ferguson.
"Yes, he has not won a trophy for six years but what does that mean? The quality of his side has not been reduced. He still has great quality in his teams.
"The competition is far greater now. When Arsenal and ourselves were going head-to-head, that went on for about eight years.
"It (the criticism) is a bit unfair of course. But who understands fairness and unfairness today. It is quite a cynical world. Supporters are far less easy to please than they were 20 years ago. It is disappointing.
"I would like to know who is going to replace him."
