Chelsea boss Andre Villas-Boas believes his side have drawn one of the hardest teams in the Champions League.
The Blues take on Italian surprise packets Napoli in the Round of 16 and the Portuguese tactician is entering the two-legged fixture with trepidation.
"Napoli is a club that represents the city and the city has great empathy with the club.
"It has a tremendous fan base and it is one of the most difficult and exciting games of the last 16, no doubt about it.
"They are a side that works collectively very well and [head coach] Walter Mazzarri has always been a coach that organises his teams very well," Villas-Boas added.
"They have been improving tremendously under his guidance and have been gaining the results that they want and they expect.
"They are fully motivated and they have a lot of talent coming through like (Marek) Hamsik and (Edinson) Cavani. They have a lot of talent throughout.""I think we have one of the most difficult draws but whichever team you get in the last 16 will be a difficult team," he told the club's official website.
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