Manchester United boss Sir Alex Ferguson has taken a swipe at Double winners Chelsea.

Ferguson is adamant Jose Mourinho is a better boss than current Blues manager Carlo Ancelotti.

Mourinho's Chelsea were champs in 2005 and 2006.

And Fergie declared to L'Equipe: "Jose is an intelligent guy. Each time he speaks to the media, he galvanises his team. He has a tremendous effect on his players.

"The Chelsea of today have not rediscovered this unshakeable faith, even if they have won the title.

"With Mourinho, I understood after two Chelsea title wins that I had to adapt my preparation for my team to be competitive earlier in the season.

"I could not allow myself to let Chelsea get away. The Mourinho challenge was one of intelligence, of confidence in one's self. I had to pick up this challenge."