Dries Mertens scored his 121st goal for Napoli before being substituted against Barcelona on Tuesday....
Gennaro Gattuso said Barcelona did not hurt Napoli, who paid the price for a "single error" at Stadio San Paolo.
After scoring four against Tottenham in October, Serge Gnabry continued his love affair with London with a brace against Chelsea.
Preston North End succumbed to West Brom on Tuesday, while promotion hopefuls Brentford and Bristol City lost on their travels.
Barcelona salvaged a 1-1 draw at Napoli on Tuesday, but Antoine Griezmann expects more at Camp Nou.
Chelsea manager Frank Lampard admitted a 3-0 thrashing at home to Bayern Munich in the first leg of their Champions League last 16 tie was a reality check for how far behind the European elite the Blues now find themselves.
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