Barcelona produced their best display since La Liga restarted last month as they won 4-1 at Villarreal on Sunday but they remain four points adrift of league leaders Real Madrid.
Gerard Moreno cancelled out an early own goal from Pau Torres in an end-to-end opening before Barca put their foot on the accelerator.
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Goals from Luis Suarez and Antoine Griezmann moved Quique Setien into a two-goal lead before the break.