Steven Pienaar and Denis Stracqualursi struck as Everton piled on the pressure for Chelsea manager Andre Villas-Boas with a 2-0 victory.
Pienaar celebrated his Goodison Park return by firing the Toffees into a fifth-minute lead on another dismal Barclays Premier League afternoon for Chelsea and Stracqualursi doubled the advantage in the second half.
The defeat left Chelsea without a win in four league games and was another setback in their bid to retain a top-four place.
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