(http://cdnza.playfair.co.za/kickoff/ac1b3487f3b5971fd9bb10850766aa2a_80x80.jpg) Chelsea manager Andre Villas-Boas believes it is 'difficult … [but] not impossible' to progress in the Champions League after his side were beaten 3-1 by Napoli in the first leg of their last-16 tie.
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