Wenger called the Blues a ‘cup team’, accused owner Roman Abramovich of being trigger-happy with managers and took a swipe at the club’s huge wage bill.
Wenger, previewing tonight’s clash for French TV, said: “Chelsea have had a spell of doubts and uncertainties during the season.
“They are a club that has invested enormous amounts of money every year. Their wage bill is absolutely mind-boggling.
“The moment their results are not up to the mark, their owners react very quickly.
“But as their squad is very mature, they quickly know how to get a grip on themselves and they don’t panic. Their squad always manages to bounce back.
“That said, let’s not forget that Chelsea are very far off the pace in the league.
“Chelsea are a cup team these days. Maybe they can’t keep up the pace in a marathon but they can handle a sprint.
“They are also a team with Didier Drogba up their sleeves.
“I have sometimes criticised him for his attitude. But you have to respect him as a player, for the quality of his performances and the animalistic side to him.”