The former Aston Villa skipper believes the arrival of Guus Hiddink at Stamford Bridge is bad news for the Old Lady.
Mellberg told Setanta Sports: “To me this Champions League knock-out stage against Chelsea is special because I’m back in England to play against one of the best clubs of the country.
“But I’m pretty much focused on doing my duty with Juve and I expect two tough games.
“Some Italian media have described Chelsea as a club that is going through a crisis, but I don’t believe in it at all, especially since they have changed coaches.
“Hiddink’s arrival will fill them with extra motivation, that’s for sure.
“Is there a favourite to go through? Not really, but I think that playing the away leg at home is an asset for Juve.
“Defending against people like Nicolas Anelka or Drogba is far from easy. Besides, every player from the Chelsea team is involved in their attacks, which can prove a problem.
“As far as Juventus are concerned, we are determined to go as far as possible in the competition. We know that it’s not going to be easy, but anything can happen, like when Chelsea lost the last final on penalties.
“Ranieri has prepared this game very carefully. It’s not just another game to him because he is back against his old club.
“We are ready to shine in London.”