The Ivory Coast striker struck in the third minute, played in Brazil midfielder Ramires for the second in the 22nd and wrapped up victory 14 minutes from the end to demote the Spanish team from the competition into the Europa League.
Needing a victory or a scoring draw to progress at Chelsea’s expense, two-time finalist Valencia was allowed to dominate possession but was stifled by the hosts’ packed defense.
Chelsea advanced to the last 16 for the ninth straight year.
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